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- 1. Multiple Choice___ Law says that the Induced current is proportional to the change of magnetic fluxLenz'Faraday'sAmpere's
- 2. Multiple Choice___ Law says that a current produced by an induced emf moves in a direction so that its magnetic field opposes the original change in fluxLenz'Faraday'sAmpere's
- 3. Multiple ChoiceIn 1831 who discovered electromagnetic induction?Thomas EdisonNikola TeslaMichael Faraday
- 4. Multiple ChoiceWhat would happen if I move a bar magnet in and out of a coil of copper wire?Electric current would disappearThe magnet would explodeElectric current will flow through the wireIt would produce a gravitational field
- 5. Multiple Choice
What happens to the galvanometer if the copper rod is moved upwards?
No change
Deflect to the right
Deflect to the left
Deflect to the right and left
- 6. Multiple Choice
Which action will increase the deflection of the galvanometer pointer?
The magnetic pole is reversed
The number of turns of coils is increased
The coil is made from insulated wire
The magnet is slowly pushed into the coil
- 7. Multiple ChoiceThe voltmeter is at 0 in this image. How would you manipulate the experiment to create electricity (measured in volts)?Flip the magnet around so the North pole is facing outMove the magnet back and forthTake the magnet outAdd more coils around the paper cylinder
- 8. Multiple ChoiceHow could the experimenter increase the amount of electricity being induced by this experiment?Increase the number of coilsDecrease the number of coilsFlip the magnet aroundNothing, the amount of electricity cannot be increased
- 9. Multiple ChoiceWhat benefit is gained by the addition of the iron core in an electromagnet?It makes a strong magnet weakerIt makes a weak magnet strongerThere is no benefit at allIt lets currents interact with each other
- 10. Multiple Choice
As the north pole of the magnet is moved into the coil, the magnetic flux is _________.
increasing
decreasing
remains constant
depends on the speed of the magnet
- 11. Multiple ChoiceA device that converts mechanical energy into electrical energyA. electric generatorB. electric motorC. electromagnetic inductionD. mechanical generator
- 12. Multiple Choice
What happen to the Galvanometer?
Deflected to the right
Deflected to the left
Nothing happen
- 13. Multiple Choice
What is the Pole at X
North
South
- 14. Multiple Choice
What happen to the Galvanometer?
Deflected to the right
Deflected to the left
Nothing happen
- 15. Multiple Choice
Click all the factors affecting electromagnetic induction
Strength of magnet
The area of the coil
The speed of movement
Number of turns of coil
The position of poles
- 16. Multiple Choice
Direction of deflection of the galvanometer pointer can be determined by
Lenz's Law
Faraday's Law
Fleming's Left Hand Rule
Fleming's Right Hand Rule
- 17. Multiple ChoiceElectromagnetic induction is change in ___________________.surface areamagnetic polesmagnetic flux
- 18. Multiple Choice
Based on the picture in red box,
Why the Galvanometer pointer is at the middle?
Current flow through wire
There is change in magnetic flux
No change in magnetic flux
- 19. Multiple Choice
The graph represents
DC Generator
AC Generator
- 20. Multiple Choice
How to increase the induced current?
Change carbon brush
Change position of the pole
Use small scale Galvanometer
Increase number of coils
- Answer choicesTagsAnswer choicesTags