Electromagnetic induction

Voltage can be induced in a wire by

• a. 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

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NGSS.HS-PS2-5

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

• Electric current would disappear 
• The magnet would explode 
• Electric current will flow through the wire
• It would produce a gravitational field

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NGSS.HS-PS2-5

NGSS.HS-PS3-5

A magnet can move in a coil of wire to produce electricity in which system?

• Generator
• Motor
• Magnet
• Transformer

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NGSS.HS-PS2-5

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

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NGSS.HS-PS2-5

NGSS.HS-PS3-5

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

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NGSS.HS-PS2-5

How 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

Tags

NGSS.HS-PS2-5

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

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NGSS.HS-PS2-5

NGSS.HS-PS3-5

A device that converts mechanical energy into electrical energy

• A. electric generator
• B. electric motor
• C. electromagnetic induction
• D. mechanical  generator

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NGSS.HS-PS3-3

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

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NGSS.HS-PS2-5

NGSS.HS-PS3-5

How to increase the induced current?

• Change carbon brush

• Change position of the pole

• Use small scale Galvanometer

• Increase number of coils

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NGSS.HS-PS2-5