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- 1. Multiple Choice
What two forces are required for generators and electric motors to work?
magnetism and thermal
electricity and magnetism
electricity and thermal
magnetism and radiant
- 2. Multiple Choice
Motors are devices that convert ____ energy into ____ energy.
electrical; mechanical
chemical; mechanical
mechanical; electrical
potential; kinetic
- 3. Multiple Choice
This picture is an example of a ___________.
Step Up Transformer
Motor
Step Down Transformer
Generator
- 4. Multiple Choice
Generators are devices that convert _____ energy into _____ energy.
mechanical; electrical
potential; kinetic
chemical; mechanical
electrical; mechanical
- 5. Multiple Choice
A transformer actually transforms
generators into motors
magnetic field lines
voltage
- 6. Multiple Choice
What is produced by moving a permanent magnet through a coil of copper wire?
light
electricity
sound
electromagnet
- 7. Multiple Choice
What energy do you put IN to a generator?
Thermal
Mechanical
Electrical
Potential
- 8. Multiple ChoiceWhat is an electromagnet?
a temporary magnet made from current carrying wire around a magnetic metal core.
a permanent magnet with a north and south pole
- 9. Multiple Choice
How would using a stronger permanent magnet help optimize the simple motor?
It would allow more electricity to flow through causing it to spin faster
It would reduce the amount of friction within the electrical field
It would strengthen the magnetic field, allowing for a stronger push and pull
It would reverse the N and S poles of the permanent magnet
- 10. Multiple Choice
How can you use a magnet and wire coil to produce electricty?
Put them near each other
Place the magnet inside the coil and not move
Move the magnet in and out of the coil
Hold them next to each other and shake
- 11. Multiple Choice
Motor or Generator?
Motor
Generator
- 12. Multiple Choice
What will increase the strength of an electromagnet. (choose all that apply)
increaese the number of coils
lower the voltage
decrease the current
increase the voltage
- 13. Multiple ChoiceHow could the experimenter increase the amount of electricity being induced by this experiment?
Increase the number of coils
Decrease the number of coils
Flip the magnet around
Nothing, the amount of electricity cannot be increased
- 14. 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
- 15. Multiple ChoiceWhat device is made of coils of wire with an electrical current passing through it in order to generate a magnetic field?
Electromagnet
Generator
Electron Magnet
Motor
- 16. Multiple ChoiceSurrounding every magnet is a __________ __________.magnetic fieldelectrical currentanother magnetan enemy
- 17. Multiple Choice
What would happen if you broke a bar magnet into 8 pieces?
You would have 8 half magnets
You would have 4 complete magnets
You would have 8 complete magnets
They wouldn't be magnets anymore
- 18. Multiple Choice
A transformer actually transforms
voltage
magnetic field lines
generators into motors
- 19. Multiple Choice
A device that transforms electric energy to mechanical or kinetic energy is a
generator
motor
transformer
magnet
- 20. Multiple Choice
How are electromagnets different from permanent magnets?
magnets can be turned on/off
you can turn an electromagnet on/off
magnets are more powerful
magnets have a North and South pole
- 21. Multiple Choice
Why did this simple electric motor work?
The current from the battery induces a magnetic field in the copper loop, turning it into an electromagnet that repels from/attracts to the permanent magnet
The electromagnet on top of the battery pulls on the magnetic copper wire
The magnet induces a current in the copper loop which makes it rotate.
The magnetic field from the battery induces an electric current in the copper loop, turning it into an electromagnet that repels from/attracts to the permanent magnet
- 22. Multiple Choice
What conclusion can you draw from this graph?
As current increases, magnetic strength decreases.
As current increases, magnetic strength increases.
As current decreases, magnetic strength increases.
There is no relationship between current and magnetic strength.
- 23. Multiple ChoiceThe process of creating a current in a circuit by changing a magnetic fieldA. electric generatorB. electric motorC. electromagnetic inductionD. magnet
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