Thursday, 15 November 2012
Sunday, 4 November 2012
Mechanics
The branch of physics that deals with the action of forces on bodies and with motion, comprised of kinetics, statics, and kinematics.
Basic physical quantities: displacement, distance, velocity, acceleration
Motions
in strait line with constant velocity
constant acceleration
constant retardation
free fall
going down on a slope
periodical motion
motion of pendulum
Thursday, 27 September 2012
Wednesday, 26 September 2012
Heat, thermodynamics
Energy
What is energy?Energy Is the Ability to Do Work.
Thermodynamics is the study of the inter-relation between heat, work and internal energy of a system.
internal
kinetic
chemical
potential
electrical
atomic
First Law of Thermodynamics
The change in a system's internal energy is equal to the difference between heat added to the system from its surroundings and work done by the system on its surroundings.Energy can be changed from one form to another, but it cannot be created or destroyed.
Second Law of Thermodynamics:
It is impossible for a process to have as its sole result the transfer of heat from a cooler body to a hotter one.In any closed system, the entropy of the system will either remain constant or increase.
Entropy is the quantitative measure of disorder in a system.
work in greater than work out
Third Law of Thermodynamics:
As a system approaches absolute zero, it will eventually have to draw energy from whatever systems are nearby. If it draws energy, it can never obtain absolute zero. So, this state is not physically possible, but is a mathematical limit of the universe.
Three ways in which the heat can travel
Conduction
conductor, insulator
to trap air
to reduce
U- values
A U value is a measure of heat loss in a building element such as a wall, floor or roof. It can also be referred to as an ‘overall heat transfer co-efficient’ and measures how well parts of a building transfer heat.
Lost heat per second = U-value * area * temperature difference
window double glazed 3
window single glazed 5.6
wall with air cavity 1.5
wall with insulation in cavity 0.5
Convection
chimney
sea breeze
Radiation
dull black
bright shiny
silver paint
greenhouses
vacuum flask
fur side inwards
Thursday, 31 May 2012
Elektromosság dolgozat 10/11B
Fizika 10 évf 124-158 oldal
1. Mi a jele és a mértékegysége a következő mennyiségeknek: áramerősség, feszültség, ellenállás, teljesítmény, töltés
2. Szavakkal magyarázd meg mit jelentenek a következő mennyiségek: áramerősség, feszültség, ellenállás, teljesítmény
3. Milyen összefüggés van a következő mennyiségek között: áramerősség, feszültség, ellenállás, teljesítmény
4. Rajzolj le 8 áramköri szimbólumot és írd mellé a jelentését.
5. Mit mond ki az Ohm törvénye, képletben és szavakban is írd le.
6. Mi az a változtatható vagy tolóellenállás. Készíts rajzot is. Mi használható?
7. Mitől függ egy drótdarab ellenállása. (133 old)
8. Mi az a szupravezetés és mire használható?
9. Hogyan működnek az érintőképernyők? Legalább két működési módot írjál le.
10. Milyen biztosítékokat ismersz és hogyan működnek?
11. Egy 1200 W teljesítményű hajszárítóval 20 perc alatt, egy 900 W teljesítményűvel 30 perc alatt tudjuka hajunkat megszárítani. Melyik esetben kerül a szárítás többe?
12. Az önkormányzat úgy dönt, hogy ezentúl éjszakánként kivilágítja a falu legszebb szobrát 6 db 500 W-os lámpával. Kb mennyibe kerül ez a döntés havonta?
13. Sorolj fel minél több módot, ahogyan tudunk elektromos áramot spórolnia az otthonunkban.
14. Milyen következményei vannak, ha valakit megcsap az áram? Mit tudunk ilyen esetben tenni a sérült személlyel?
15. Mi a defibrillátor és hogyan használható?
16. Hány vezeték megy egy konnektorba és melyiknek mi a funkciója?
17. Mi a soros és párhuzamos kapcsolás közötti különbség? (áramerősség, feszültség)
18. Digitális fényképezőgépbe 2 elemet kell tenni. Hogyan vannak kapcsolva za elemek és miért úgy?
19. Mi azok a félvezetők?
20. Írd le mit tudsz a diódákról.
21. Írd le mit tudsz a tranzisztorokról?
22. Hogyan működik a galvánelem.
23. Melyik folyadék vezeti és melyik nem vezeti az áramot és miért viselkednek így?
24. Egy 20ohm és 40 ohm ellenállást párhuzamosan kötünk egy 7 V-os telepre. Mekkora áramerősség folyik az egyik és melyik a másik ágban. Mekkora feszültség esik az egyik és másik ellenálláson. (Crocodil)
25. Mi a a váltókapcsoló és mire használják. Készíts kapcsolási rajzot.
1. Mi a jele és a mértékegysége a következő mennyiségeknek: áramerősség, feszültség, ellenállás, teljesítmény, töltés
2. Szavakkal magyarázd meg mit jelentenek a következő mennyiségek: áramerősség, feszültség, ellenállás, teljesítmény
3. Milyen összefüggés van a következő mennyiségek között: áramerősség, feszültség, ellenállás, teljesítmény
4. Rajzolj le 8 áramköri szimbólumot és írd mellé a jelentését.
5. Mit mond ki az Ohm törvénye, képletben és szavakban is írd le.
6. Mi az a változtatható vagy tolóellenállás. Készíts rajzot is. Mi használható?
7. Mitől függ egy drótdarab ellenállása. (133 old)
8. Mi az a szupravezetés és mire használható?
9. Hogyan működnek az érintőképernyők? Legalább két működési módot írjál le.
10. Milyen biztosítékokat ismersz és hogyan működnek?
11. Egy 1200 W teljesítményű hajszárítóval 20 perc alatt, egy 900 W teljesítményűvel 30 perc alatt tudjuka hajunkat megszárítani. Melyik esetben kerül a szárítás többe?
12. Az önkormányzat úgy dönt, hogy ezentúl éjszakánként kivilágítja a falu legszebb szobrát 6 db 500 W-os lámpával. Kb mennyibe kerül ez a döntés havonta?
13. Sorolj fel minél több módot, ahogyan tudunk elektromos áramot spórolnia az otthonunkban.
14. Milyen következményei vannak, ha valakit megcsap az áram? Mit tudunk ilyen esetben tenni a sérült személlyel?
15. Mi a defibrillátor és hogyan használható?
16. Hány vezeték megy egy konnektorba és melyiknek mi a funkciója?
17. Mi a soros és párhuzamos kapcsolás közötti különbség? (áramerősség, feszültség)
18. Digitális fényképezőgépbe 2 elemet kell tenni. Hogyan vannak kapcsolva za elemek és miért úgy?
19. Mi azok a félvezetők?
20. Írd le mit tudsz a diódákról.
21. Írd le mit tudsz a tranzisztorokról?
22. Hogyan működik a galvánelem.
23. Melyik folyadék vezeti és melyik nem vezeti az áramot és miért viselkednek így?
24. Egy 20ohm és 40 ohm ellenállást párhuzamosan kötünk egy 7 V-os telepre. Mekkora áramerősség folyik az egyik és melyik a másik ágban. Mekkora feszültség esik az egyik és másik ellenálláson. (Crocodil)
25. Mi a a váltókapcsoló és mire használják. Készíts kapcsolási rajzot.
Monday, 2 April 2012
Dinamika dolgozat 10b/11b
Április 6-án témazáró dolgozat dinamikából
Íme a kérdések! Holnap, kedden még teszek fel egypárat, de utána nem lesz több.
Az egyetemi látogatásról készült esszé határideje április 12. Aki nem volt, keressen az Interneten 4 érdekes, otthon elvégezhető kísérletet, csinálja meg és arról írjon dolgozatot.
Jó tanulást :)
Íme a kérdések! Holnap, kedden még teszek fel egypárat, de utána nem lesz több.
Az egyetemi látogatásról készült esszé határideje április 12. Aki nem volt, keressen az Interneten 4 érdekes, otthon elvégezhető kísérletet, csinálja meg és arról írjon dolgozatot.
- Newton életével kapcsolatos kérdések
- Magán élete legmeghatározóbb eseményei
- Tudományos munkásságának eredményei
- Newton három törvénye (angolul is esetleg)
- Erő jelen, mértékegysége
- Erő típusok
- Gravitációs erő
- Mit mond ki a gravitációs erőtörvény
- Mi a képlete
- Magyarázd meg a képletben a betűk mit jelentenek
- Mekkora erővel vonzza a Föld a Holdat és fordítva? (Függvénytáblázatban benne vannak az adatok)
- Cavendish kísérlete (rajz magyarázat)
- Rugóerő kiszámolása, képlet értelmezése és alkalmazása
- Pl. Egy 12 N/cm rugóállandójú rugóra felakasztunk egy testet, ami 20 cm-rel nyújtja meg a rugót
Mekkora a test tömege ha a Földön vagyunk és mekkora lenne ha a Holdon lennénk. - Egy 300 gm tömegű test 3 cm-rel nyújt meg egy rugót. Mekkora a rugó rugó állandója?
- Közeg ellenállási erő. Mi a kiszámolási módja és mit jelentenek a képletben a betűk?
- Sűrűség
- Hogyan lehet kiszámolni?
- Henger magassága 10 cm átmérője 3 cm. Tömege 400 gm. Mekkora az anyag sűrűsége?
- Ha vízbe tennék ezt az anyagot úszna-e? És ha higanyba tennénk?
- Mi az a súlytalanság?
- Hol nagyobb egy test tömege a Marson vagy a Földön?
- Hol nagyobb a test súlya a Jupiteren vagy a Földön?
- Egy liftben egy mérlegre állsz. Ha megáll egy lift, akkor mennyit mutat a mérleg és miért?
Ha elindul a lift, akkor mennyit mutat a mérleg és miért? - Mekkora annak a hordónak a térfogata, amibe 180 kg gázolajat tudunk tölteni. A gázolaj sűrűsége 840 km/m3
- Miben különbözik a téli és nyári gumi és miért különbözik több dologban?
- Csillagászat
- Hogyan számolták ki a Föld sugarát?
- Hogyan számolgató ki a föld tömege?
- Hogyan számolták ki a Hold távolságát a Földtől?
- Hogyan számolták ki a Nap távolságát a Földtől?
- Mi az a geostacionárius műhold?
Jó tanulást :)
Sunday, 26 February 2012
Látogatás az elektrotechnikai múzeumba
Indulás 9:30 érkezés 12:30
Részvételi díj 300 Ft
Statikus elektromosság
Dörzslektromos gépek (10000 volts produces a spark 1 cm long)
Volta telep (1793) (Galvani 1791)
Kémiai energiából elektromos energiát állítanak elő. (Két különböző fém egy elektrolit oldatban.)
Oersted kísérlet
Áram mágneses teret kelt mag körül.
Elektromotor
Elektromos energiából mechanikai energiát hoz létre. Azon alapul, hogy az áram mágneses teret kelt.
Elektromágneses indukció
Ha egy elektromos vezető közelében a mágneses téret megváltoztatjuk, akkora vezetőben áram indukálódik.
Phet simulation
Generátor, dinamó
Mechanikai energiából elektromos energiát gyárt elektromágneses indukció elvén.
Transzformátor
Váltóáram-egyenáram
Transzformátor két tekercsből és egy vasmagból áll. A bemenő feszültséget fel vagy letranszformálja.
Indulás 9:30 érkezés 12:30
Részvételi díj 300 Ft
Statikus elektromosság
Dörzslektromos gépek (10000 volts produces a spark 1 cm long)
Van de Graf generátor
Volta telep (1793) (Galvani 1791)
Kémiai energiából elektromos energiát állítanak elő. (Két különböző fém egy elektrolit oldatban.)
Oersted kísérlet
Áram mágneses teret kelt mag körül.
Elektromotor
Elektromos energiából mechanikai energiát hoz létre. Azon alapul, hogy az áram mágneses teret kelt.
Elektromágneses indukció
Ha egy elektromos vezető közelében a mágneses téret megváltoztatjuk, akkora vezetőben áram indukálódik.
Phet simulation
Generátor, dinamó
Mechanikai energiából elektromos energiát gyárt elektromágneses indukció elvén.
Transzformátor
Váltóáram-egyenáram
Transzformátor két tekercsből és egy vasmagból áll. A bemenő feszültséget fel vagy letranszformálja.
Wednesday, 1 February 2012
Elektrosztatika dolgozat 10B
Elektrosztatika dolgozat 10B
- Mit figyeltek meg a görögök az elektromosággal kapcsolatban?
- Honnan ered az elektron szó?
- Hogyan lehet vizet meggörbíteni?
- Hogyan bizonyítanád be hogy kétféle elektromos töltés van és hogy az azonos töltések .... egymást, a különböző töltések .... egymást?
- Mit állíthatunk egy semleges testről?
- Miért lehet műanyag rudat dörzsléssel elektromos állapotba hozni és miért nem lehet egy fémrudat?
- Mire való a földelés?
- Mi az az elektroszkóp? rajz
- Mit tudsz Benjamin Franklinról?
- Miért kevernek az ékszíj anyagába kormot?
- Mit állít a Coulomb törvény?
- Milyen eszközzel bizonyította be Coulomba törvényét? rajz
- Mi az a polarizáció?
- Hogyan működik az elektrosztatikus festés?
- Hogyan leheta füstből kiszűrni a kormot? rajz
- Milyen az elektromos mező alakja két egmás közelében levő pozitív töltés esetén?
- Hogyan működik a lézernyomtató? Rajz
- Mekkora feszültég vana konnektorban ésa villámban?
- Miért nem veszélyes villámok között repülni?
- Miért nem szólt a mobil celofánba csomagolva?
- Mi a Faraday kalitka?
- Hogyan kaphatunk elektromos szelet?
- Mi a aSegner kerék, hogyan működik?
- Mekkora erő hat egy 0,00002C és egy 0,0002 C nagyságú töltések között, amik 20 cm távol vannak egymástól?
Saturday, 28 January 2012
Elektrosztatika kísérletek
1. Phet feladat Ballonos kísérlet (Angol gyakorló, válaszok lehetnekmagyarul. de angolul több pontot érnek)
What type of charge was transferred from the sweater to the balloon?
What type of charge did the sweater have at the beginning of the experiment?
Play with the simulation and observe what happens when the balloon is rubbed on the sweater. Explain why this happens.
What type of charge did the sweater have at the end of the experiment?
Why don’t all the positive charges move toward the balloon?
Bring your charged balloon near the wall and describe what happens to the wall. Explain why this happens.
What happens to the positive charges in the wall when you move the balloon near it?
Now, take your charged balloon and place it somewhere between the wall and the sweater. Observe what happens, and describe it here. Explain why this happens!
Hold the balloon in between the wall and shirt and release it. Why doesn’t the balloon just stay in the middle?
When charging an object by friction,
a. only the positive charges move from one object to the other.
b. only the negative charges move from one object to the other.
c. both the positive and negative charges move from one object to the other.
d. neither the positive nor the negative charges move from one object to the other.
When an object becomes polarized,
a. only the positive charges move within the object.
b. only the negative charges move within the object.
c. both the positive and negative charges move within the object.
d. neither the positive nor the negative charges move within the object.
Based upon what you saw in this lab, then, it can be said that
a. positive charges are stationary within objects.
b. negative charges are stationary within objects.
c. positive charges are mobile within objects.
d. negative charges are mobile within objects.
e. both a and b
f. both a and d
g. both b and c
h. both c and d
charge - töltés
stationary - nem mozdulnak el
sweater -pulcsi
to rub - dörzsöl
to observ - megfigyel
to release - elenged
shock - szikra
conductor - vezető
insulator- szigetelő
knob- kilincs
--------------------------------------------------------------------------------------------------
2. Phet feladat John Travoltage kísérlet (Angol gyakorló, válaszok lehetnekmagyarul. de angolul több pontot érnek)
Rub John Travoltage’s foot on the carpet and observe what happens. What is this called?
Watch after you stopped rubbing John Travoltage’s foot on the carpet, what happened to the charges in his body?
Now, touch John Travoltage’s hand to the door knob. Observe what happens. Explain why this happens.
Now try building up charge while his finger is on the door. What happens?
Why are shocks worse when you touch conductors rather than insulators?
If you take your hat off on a dry winter day, sometimes your hair will stand up. Explain this phenomenon.
Over time, all the negative charges in an object,
a. remain clustered together where they were placed.
b. spread out over a small area on the object.
c. spread out over a large area on the object.
When a charged object touches a conductor,
a. the positive charges move to the conductor and exit the object.
b. the negative charges move to the conductor and exit the object.
c. both the positive and negative charges move to the conductor and exit the object.
d. neither the positive nor the negative charges move to the conductor and exit the object.
Based upon what you saw in this lab, then, it can be said that
a. a person cannot be shocked if they have an excess charge on them.
b. a person cannot be shocked if they have neutral charge.
c. a person can be shocked at any time because it doesn’t depend on the charge the person has.
charge - töltés
stationary - nem mozdulnak el
sweater -pulcsi
to rub - dörzsöl
to observ - megfigyel
to release - elenged
shock - szikra
conductor - vezető
insulator- szigetelő
knob- kilincs---------------------------------------------------------------------------------------------------
3. Phet feladat, Elektromos hoki kísérlet (Angol gyakorló, válaszok lehetnekmagyarul. de angolul több pontot érnek)
The goal of this game is to get the black positive puck to go in the goal. How can you set up just one negative charge to score a goal?
Clear each time you try a new set up.How can you set up just one positive charge to score a goal?
Change the mass and see what happens. What happens when the mass is lighter? Why does the mass affect the speed if it is not apart of the electric force equation?
Set up a triangle of charges, with two positives and one negative. Draw the field lines for this set up.
Set difficulty to 1, then 2, then 3. When you beat each level, draw your set up, and show me.
Legkevesebb részecske felrakásával hogyan tudnád a kapuba tenni a képen látható pozitív részecskét.
Eredményt rajzold le.
puck -korong
triangle- háromszög
field line- erővonal
What type of charge was transferred from the sweater to the balloon?
What type of charge did the sweater have at the beginning of the experiment?
Play with the simulation and observe what happens when the balloon is rubbed on the sweater. Explain why this happens.
What type of charge did the sweater have at the end of the experiment?
Why don’t all the positive charges move toward the balloon?
Bring your charged balloon near the wall and describe what happens to the wall. Explain why this happens.
What happens to the positive charges in the wall when you move the balloon near it?
Now, take your charged balloon and place it somewhere between the wall and the sweater. Observe what happens, and describe it here. Explain why this happens!
Hold the balloon in between the wall and shirt and release it. Why doesn’t the balloon just stay in the middle?
When charging an object by friction,
a. only the positive charges move from one object to the other.
b. only the negative charges move from one object to the other.
c. both the positive and negative charges move from one object to the other.
d. neither the positive nor the negative charges move from one object to the other.
When an object becomes polarized,
a. only the positive charges move within the object.
b. only the negative charges move within the object.
c. both the positive and negative charges move within the object.
d. neither the positive nor the negative charges move within the object.
Based upon what you saw in this lab, then, it can be said that
a. positive charges are stationary within objects.
b. negative charges are stationary within objects.
c. positive charges are mobile within objects.
d. negative charges are mobile within objects.
e. both a and b
f. both a and d
g. both b and c
h. both c and d
charge - töltés
stationary - nem mozdulnak el
sweater -pulcsi
to rub - dörzsöl
to observ - megfigyel
to release - elenged
shock - szikra
conductor - vezető
insulator- szigetelő
knob- kilincs
--------------------------------------------------------------------------------------------------
2. Phet feladat John Travoltage kísérlet (Angol gyakorló, válaszok lehetnekmagyarul. de angolul több pontot érnek)
Rub John Travoltage’s foot on the carpet and observe what happens. What is this called?
Watch after you stopped rubbing John Travoltage’s foot on the carpet, what happened to the charges in his body?
Now, touch John Travoltage’s hand to the door knob. Observe what happens. Explain why this happens.
Now try building up charge while his finger is on the door. What happens?
Why are shocks worse when you touch conductors rather than insulators?
If you take your hat off on a dry winter day, sometimes your hair will stand up. Explain this phenomenon.
Over time, all the negative charges in an object,
a. remain clustered together where they were placed.
b. spread out over a small area on the object.
c. spread out over a large area on the object.
When a charged object touches a conductor,
a. the positive charges move to the conductor and exit the object.
b. the negative charges move to the conductor and exit the object.
c. both the positive and negative charges move to the conductor and exit the object.
d. neither the positive nor the negative charges move to the conductor and exit the object.
Based upon what you saw in this lab, then, it can be said that
a. a person cannot be shocked if they have an excess charge on them.
b. a person cannot be shocked if they have neutral charge.
c. a person can be shocked at any time because it doesn’t depend on the charge the person has.
charge - töltés
stationary - nem mozdulnak el
sweater -pulcsi
to rub - dörzsöl
to observ - megfigyel
to release - elenged
shock - szikra
conductor - vezető
insulator- szigetelő
knob- kilincs---------------------------------------------------------------------------------------------------
3. Phet feladat, Elektromos hoki kísérlet (Angol gyakorló, válaszok lehetnekmagyarul. de angolul több pontot érnek)
The goal of this game is to get the black positive puck to go in the goal. How can you set up just one negative charge to score a goal?
Clear each time you try a new set up.How can you set up just one positive charge to score a goal?
Change the mass and see what happens. What happens when the mass is lighter? Why does the mass affect the speed if it is not apart of the electric force equation?
Set up a triangle of charges, with two positives and one negative. Draw the field lines for this set up.
Set difficulty to 1, then 2, then 3. When you beat each level, draw your set up, and show me.
Legkevesebb részecske felrakásával hogyan tudnád a kapuba tenni a képen látható pozitív részecskét.
Eredményt rajzold le.
puck -korong
triangle- háromszög
field line- erővonal
Modern physic
Presentation
Criterias for the presentation
27-23 | 22-18 | 17-13 | 12-8 | 7-0
You have to send me your presentation in email before the lesson.
Topics
Criterias for the presentation
- understandable, not too easy and not too difficult
- you have to speak slowly so that the others can take notes
- 10-20 new words but not more (tell the meaning of the new words)
- 20 minutes presentation
- 5 minutes quize for the audience
- 5 minutes for questions
- good pictures
- 1 or max 2 short videos
- good PP presentation (short text, readable)
27-23 | 22-18 | 17-13 | 12-8 | 7-0
You have to send me your presentation in email before the lesson.
Topics
- Röntgen (FA)
- Bequerel (HA)
- Marie and Pierre Curie (SI)
- J J Thomson ()
- Hans Wilhelm Geiger
- Rutherford ()
- Max Plank
- Einstein (HB)
- Niels Bohr (BJ)
- Louis de Broglie,Clinton Davisson and George Thomson
- Heisenberg ()
- Enrico Fermi ()
- Neumann János, Szilárd Leo, Wigner Jenő (HR)
- Discovery of atomic bomb, Manhattan project (HP)
- Nuclear power station
- Csernobil
- Teller Ede hidrogén bomba (SP)
- Murray Gell-Mann, quark theory ()
- Richard Feymann
- Particle zoo, antimatter
- CERN
- Peter Higgs
- Standard modell
- Relativity theory
Friday, 27 January 2012
Top Skills and Values Employers Seek
1. Strong Work Ethic Are you motivated and dedicated to getting the job done, no matter what?
2. Positive Attitude Are you optimistic and upbeat?
3. Good Communication Skills Are you both verbally articulate and a good listener?
4. Time Management Abilities Do you know how to prioritize tasks and work on a number of different projects at once?
5. Problem-Solving Skills Are you resourceful and able to creatively solve problems that will inevitably arise?
6. Acting as a Team Player Will you work well in groups and teams?
7. Self-Confidence Do you truly believe you can do the job?
9. Flexibility/Adaptability Are you able to adapt to new situations and challenges?
10. Working Well Under Pressure Can you handle the stress that accompanies deadlines and crises?
11. Leadership/Management Skills
12. Honesty/Integrity/Morality
13. Dependability/Reliability/Responsibility
14. Willingness to Learn
15. Computer/Technical Literacy
16. Multicultural Sensitivity/Awareness
17. Respecting the rules
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The competencies or transferable skills that are particularly popular with graduate recruiters include:
2. Positive Attitude Are you optimistic and upbeat?
3. Good Communication Skills Are you both verbally articulate and a good listener?
4. Time Management Abilities Do you know how to prioritize tasks and work on a number of different projects at once?
5. Problem-Solving Skills Are you resourceful and able to creatively solve problems that will inevitably arise?
6. Acting as a Team Player Will you work well in groups and teams?
7. Self-Confidence Do you truly believe you can do the job?
9. Flexibility/Adaptability Are you able to adapt to new situations and challenges?
10. Working Well Under Pressure Can you handle the stress that accompanies deadlines and crises?
11. Leadership/Management Skills
12. Honesty/Integrity/Morality
13. Dependability/Reliability/Responsibility
14. Willingness to Learn
15. Computer/Technical Literacy
16. Multicultural Sensitivity/Awareness
17. Respecting the rules
------------------------------------------------------------------------------------------------------------------------------
The competencies or transferable skills that are particularly popular with graduate recruiters include:
- communication - ability to communicate orally, in writing, or via electronic means, in a manner appropriate to the audience;
- teamwork - being a constructive team member, contributing practically to the success of the team;
- leadership - being able to motivate and encourage others, whilst taking the lead;
- initiative - ability to see opportunities and to set and achieve goals;
- problem solving - thinking things through in a logical way in order to determine key issues, often also including creative thinking;
- flexibility/adaptability - ability to handle change and adapt to new situations;
- self-awareness - knowing your strengths and skills and having the confidence to put these across;
- commitment/motivation - having energy and enthusiasm in pursuing projects;
- interpersonal skills - ability to relate well to others and to establish good working relationships;
- numeracy - competence and understanding of numerical data, statistics and graphs.
Electricity test 12/A
Date of the test 3rd of February
1. Short history of electricity
Greek scientist, rubbing amber ήλεκτρον (electron) attracts small objects
Benjamin Franklin In June 1752 he is reputed to have attached a metal key to the bottom of a dampened kite string and flown the kite in a storm-threatened sky. A succession of sparks jumping from the key to the back of his hand showed that lightning was indeed electrical in nature. In June 1752 he is reputed to have attached a metal key to the bottom of a dampened kite string and flown the kite in a storm-threatened sky. A succession of sparks jumping from the key to the back of his hand showed that lightning was indeed electrical in nature.
In 1791, Luigi Galvani published his discovery of bioelectricity, demonstrating that electricity was the medium by which nerve cells passed signals to the muscles. Alessandro Volta's battery, of 1800, made from alternating layers of zinc and copper, provided scientists with a more reliable source of electrical energy than the electrostatic machines previously used.
Electromagnetism
On 21 April 1820, during a lecture, Ørsted noticed a compass needle deflected from magnetic north when an electric current from a battery was switched on and off, confirming a direct relationship between electricity and magnetism.
Michael Faraday invented the electric motor in 1821.
In 1821, soon after the Danish physicist and chemist Hans Christian Ørsted discovered the phenomenon of electromagnetism.
Electromagnetism manifests as both electric fields and magnetic fields. Both fields are simply different aspects of electromagnetism, and hence are intrinsically related. Thus, a changing electric field generates a magnetic field; conversely a changing magnetic field generates an electric field.
2. Phet simulation
http://phet.colorado.edu/en/simulation/faradays-law
http://phet.colorado.edu/en/simulation/faraday
http://phet.colorado.edu/en/simulation/generator (important)
http://phet.colorado.edu/en/simulation/magnets-and-electromagnets
http://phet.colorado.edu/en/simulation/circuit-construction-kit-dc (important)
Basic questions:
Build a circuit. One lamp, battery and a switch. What will be the current if the voltage of the battery is 15 V and the resistance of the bulb is 10 Ohm.
What happens if you increase the turns of the first or second coils in transformer?
Explain how does the generator work with the generator simulation?
What is the diffrences between bar and electromagnet? Explain it with the simulations.
3. BBC Bitesize
You have to know the test.
Electric current and voltage
Video: http://www.bbc.co.uk/schools/ks3bitesize/science/energy_electricity_forces/electric_current_voltage/activity.shtml
Test: http://www.bbc.co.uk/apps/ifl/schools/ks3bitesize/science/quizengine?quiz=electricity&templateStyle=science
Magnets and electric current
Video: http://www.bbc.co.uk/schools/ks3bitesize/science/energy_electricity_forces/magnets_electric_effects/activity.shtml
Test: http://www.bbc.co.uk/apps/ifl/schools/ks3bitesize/science/quizengine?quiz=magnetism&templateStyle=science
4. Your presentations
Electromagnets
Generator
Magnets (Earth magnetism)
Electric motor
Transformer
You have to know the basic things about them.
What is it?
How does it work?
What can be used for?
------------------------------------------------------------------------------
What was Benjamin Franklin's famous experiment?
Stromy weather, used a kite, key started to sparkle, proved that electricity in the cloud is the same as the electricity on earth
discovered that there are two types of charges
What did the Danish scientist Oersted discover?
if current flows in a wire it causes magnetic filed around the wire,
How can you produce electricity? Write down 3 different methods.
1. rubbing
2. two diffrent metal in a special liquid, Volta battery
3. generator, magnet spins in a coil (Faraday)
What was the discovery of Faraday which revolutionized the technology?
electrical motor, generator
they transfer less of their energy into heat
they are brighter than normal bulbs
it gets used up as it goes around the circuit
it does not get used up as it goes around the circuit
1. Build a circuit. One lamp, battery and a switch. What will be the current if the voltage of the battery is 15 V and the resistance of the bulb is 10 Ohm.
2. What happens if you increase the turns of the first or second coils in transformer?
If you increase the number of turns the voltage will be bigger and if you decrease the voltage will be smaller
4. Explain how does the generator work with the generator simulation?
something (water, steam)turns around a magnet and the spinning magnet induces AC current in a coil
5. What is the diffrences between bar and electromagnet? Explain it with the simulations.
you need electricity and you can switch off or on
Electromagnets
Generator
Electric motor
Transformer
What is it?
How does it work?
What can be used for?
1. Short history of electricity
Greek scientist, rubbing amber ήλεκτρον (electron) attracts small objects
Benjamin Franklin In June 1752 he is reputed to have attached a metal key to the bottom of a dampened kite string and flown the kite in a storm-threatened sky. A succession of sparks jumping from the key to the back of his hand showed that lightning was indeed electrical in nature. In June 1752 he is reputed to have attached a metal key to the bottom of a dampened kite string and flown the kite in a storm-threatened sky. A succession of sparks jumping from the key to the back of his hand showed that lightning was indeed electrical in nature.
In 1791, Luigi Galvani published his discovery of bioelectricity, demonstrating that electricity was the medium by which nerve cells passed signals to the muscles. Alessandro Volta's battery, of 1800, made from alternating layers of zinc and copper, provided scientists with a more reliable source of electrical energy than the electrostatic machines previously used.
Electromagnetism
On 21 April 1820, during a lecture, Ørsted noticed a compass needle deflected from magnetic north when an electric current from a battery was switched on and off, confirming a direct relationship between electricity and magnetism.
Michael Faraday invented the electric motor in 1821.
In 1821, soon after the Danish physicist and chemist Hans Christian Ørsted discovered the phenomenon of electromagnetism.
Electromagnetism manifests as both electric fields and magnetic fields. Both fields are simply different aspects of electromagnetism, and hence are intrinsically related. Thus, a changing electric field generates a magnetic field; conversely a changing magnetic field generates an electric field.
2. Phet simulation
http://phet.colorado.edu/en/simulation/faradays-law
http://phet.colorado.edu/en/simulation/faraday
http://phet.colorado.edu/en/simulation/generator (important)
http://phet.colorado.edu/en/simulation/magnets-and-electromagnets
http://phet.colorado.edu/en/simulation/circuit-construction-kit-dc (important)
Basic questions:
Build a circuit. One lamp, battery and a switch. What will be the current if the voltage of the battery is 15 V and the resistance of the bulb is 10 Ohm.
What happens if you increase the turns of the first or second coils in transformer?
Explain how does the generator work with the generator simulation?
What is the diffrences between bar and electromagnet? Explain it with the simulations.
3. BBC Bitesize
You have to know the test.
Electric current and voltage
Video: http://www.bbc.co.uk/schools/ks3bitesize/science/energy_electricity_forces/electric_current_voltage/activity.shtml
Test: http://www.bbc.co.uk/apps/ifl/schools/ks3bitesize/science/quizengine?quiz=electricity&templateStyle=science
Magnets and electric current
Video: http://www.bbc.co.uk/schools/ks3bitesize/science/energy_electricity_forces/magnets_electric_effects/activity.shtml
Test: http://www.bbc.co.uk/apps/ifl/schools/ks3bitesize/science/quizengine?quiz=magnetism&templateStyle=science
4. Your presentations
Electromagnets
Generator
Magnets (Earth magnetism)
Electric motor
Transformer
You have to know the basic things about them.
What is it?
How does it work?
What can be used for?
------------------------------------------------------------------------------
What was Benjamin Franklin's famous experiment?
Stromy weather, used a kite, key started to sparkle, proved that electricity in the cloud is the same as the electricity on earth
discovered that there are two types of charges
What did the Danish scientist Oersted discover?
if current flows in a wire it causes magnetic filed around the wire,
How can you produce electricity? Write down 3 different methods.
1. rubbing
2. two diffrent metal in a special liquid, Volta battery
3. generator, magnet spins in a coil (Faraday)
What was the discovery of Faraday which revolutionized the technology?
electrical motor, generator
2. Which of the following is not a magnetic material?
steel
cobalt
aluminium
cobalt
aluminium
3. What do two poles of the same type do when they are brought close together?
they attract
they repel
they make an electric current flow
they repel
they make an electric current flow
6. Where are the field lines most concentrated around a bar magnet?
at both poles
in the middle
at the north pole only
in the middle
at the north pole only
7. How can we increase the strength of an electromagnet?
add an iron core
reduce the number of turns on the coil
reduce the current in the coil
reduce the number of turns on the coil
reduce the current in the coil
8. What is one difference between electromagnets and bar magnets?
Bar magnets can be turned off but electromagnets cannot.
Bar magnets have a magnetic field but electromagnets do not.
Electromagnets need electricity but bar magnets do not.
Bar magnets have a magnetic field but electromagnets do not.
Electromagnets need electricity but bar magnets do not.
9. What can we use to find the shape of a magnetic field?
an electromagnet
a coil of wire
a compass
a coil of wire
a compass
10. What two gases are produced from electrolysis of water?
magnesium and hydrogen
hydrogen and oxygen
oxygen and magnesium
hydrogen and oxygen
oxygen and magnesium
11. What is NOT true about energy saving light bulbs?
they use less energy than normal bulbsthey transfer less of their energy into heat
they are brighter than normal bulbs
1. What needs to be done to this circuit so that the lamp lights up?
close the switch
add another lamp
add a cell and close the switch
add another lamp
add a cell and close the switch
2. What component does this circuit symbol represent?
cell
buzzer
capacitor
buzzer
capacitor
3. Which switch or switches must be closed to make the lamps light?
only switch 1
only switch 2
switches 1 and 2
only switch 2
switches 1 and 2
4. If lamp 1 is unscrewed from its holder, what will happen to lamp 2?
it will get brighter
it will go out
it will stay the same brightness
it will go out
it will stay the same brightness
5. If lamp 1 is unscrewed from its holder, what will happen to lamp 2?
it will stay lit
it will go out
it will get dimmer
it will go out
it will get dimmer
6. What is wrong with this circuit diagram?
there is only one cell
the ammeter should be connected in series
a ammeter should be connected in parallel
the ammeter should be connected in series
a ammeter should be connected in parallel
7. Which ammeter will have the biggest reading?
ammeter 1
ammeter 2
they will read the same
ammeter 2
they will read the same
8. Which statement about electric current is correct?
it always flows clockwiseit gets used up as it goes around the circuit
it does not get used up as it goes around the circuit
1. Build a circuit. One lamp, battery and a switch. What will be the current if the voltage of the battery is 15 V and the resistance of the bulb is 10 Ohm.
2. What happens if you increase the turns of the first or second coils in transformer?
If you increase the number of turns the voltage will be bigger and if you decrease the voltage will be smaller
4. Explain how does the generator work with the generator simulation?
something (water, steam)turns around a magnet and the spinning magnet induces AC current in a coil
5. What is the diffrences between bar and electromagnet? Explain it with the simulations.
you need electricity and you can switch off or on
Electromagnets
Generator
Electric motor
Transformer
What is it?
How does it work?
What can be used for?
Thursday, 19 January 2012
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