Unit 8 Review - Electromagnetic Induction

What would happen if I move a bar magnet in and out of a coil of copper wire?

• Electric current would be produced in the magnet.

• The magnet would do nothing to the coil of wire.

• Electric current would be produced in the copper wire

• It would make the copper wire produce a magnetic field.

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A device in which Mechanical Energy is used to create Electrical

Energy

• Generator
• Motor
• Magnet
• Transformer

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What happens to the magnetic field when the direction of the current in a wire is reversed?

• The magnetic field will remain unchanged

• The magnetic field will reverse direction as well

• The magnetic field will decrease in strength

• The magnetic field will increase in strength

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Which two actions would decrease the current?

• Quickly move the magnet bar into the stationary solenoid (coil)

• Slowly move the magnet into the stationary solenoid (coil)

• Quickly move the solenoid (coil) around magnet

• Slowly move the solenoid (coil) around magnet

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Which action will increase the current?

• Reverse the magnet.

• Increase the number of coils of wire.

• Move the magnet away from the coil.

• Move the magnet slowly into the coil

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How do you generate current in this experimental setup?

• Flip the magnet around so the North pole is facing out

• Move the magnet back and forth through the coil

• You don't need the magnet to create current.

• Add more coils around the paper cylinder

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How could you decrease the amount of electricity being induced by this experiment?

• Increase the number of coils

• Decrease the number of coils

• Flip the magnet around

• Move the magnet through the coils faster.

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A device in which Electrical Energy (current) is used to create Mechanical

Energy

• Generator
• Motor
• Magnet
• Transformer

Tags

NGSS.HS-PS3-3

This is a picture of a simple electromagnet. How can the magnetic field around the nail be made stronger?

• Use more coils of wire around the nail.

• Use two batteries.

• Reverse the connections on the battery.

• Use a smaller nail.

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All of the following would increase the current induced by the magnet EXCEPT

• move the magnet faster

• add more coils to the wire

• reversing the magnet direction

• use a stronger magnet

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