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- 1. Multiple ChoiceElectromagnetic induction is change in ___________________.surface areamagnetic polesmagnetic flux
- 2. Multiple ChoiceVoltage can be induced in a wire bya. moving the wire near a magnet.b. moving a magnet near the wire.c. changing the current in a nearby wire.d. all of these
- 3. 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
- 4. Multiple ChoiceA magnet is moved in and out of a coil of wire connected to a high-resistance voltmeter. If the number of coils doubles, the induced voltagequadruplesdoublesis the samehalves
- 5. Multiple ChoiceA magnet can move in a coil of wire to produce electricity in which system?GeneratorMotorMagnetTransformer
- 6. Multiple Choice___ Law says that the Induced current is proportional to the change of magnetic fluxLenz'Faraday'sAmpere's
- 7. Multiple Choice
Which description best applies to Lenz's Law?
An induced current occurs when a magnet passes through a tube.
When a change in magnetic field occurs to a coil the direction of current goes in the in the other direction to this change.
The direction of an induced current is such to align with the change that created it.
A magnet is a tube is always slowed by its magnetic field.
- 8. 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
- 9. Multiple Choice
Which activity will produce the highest current?
Move the magnet bar into the coil while the coil remains stationery
Move the coil into the magnet bar while the magnet remains stationery
Move the coil and magnet towards each other
Move the coil and magnet away from each other
- 10. 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
- 11. 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
- 12. Multiple ChoiceElectromagnetic induction is taking place in this experiment. How much electricity is being produced?-10 Volts10 Volts100 VoltsThis question cannot be answered based on this image
- 13. 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
- 14. Multiple ChoiceWhat is one way to increase the current in a wire?Decrease the number of coilsIncrease the number of coilsMove the magnet slowerTake the wire off of the magnet
- 15. 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
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