Electromagnetic Induction

___ Law says that a current produced by an induced emf moves in a direction so that its magnetic field opposes the original change in flux

• Lenz'
• Faraday's
• Ampere's

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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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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 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

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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

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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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What happen to the Galvanometer?

• Deflected to the right

• Deflected to the left

• Nothing happen

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What is the Pole at X

• North

• South

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What happen to the Galvanometer?

• Deflected to the right

• Deflected to the left

• Nothing happen

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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

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NGSS.HS-PS2-5