Electromagnetism and Right Hand Rules

The picture is an example of an:

• Electric circuit

• Electromagnet

• Electric nail

• Electric power cell

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NGSS.HS-PS2-5

NGSS.HS-PS3-5

To make this electromagnet stronger you could:

• use less wire

• have fewer wire coils around the nail

• have more wire coils around the nail

• use a plastic core

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NGSS.HS-PS2-5

NGSS.HS-PS3-5

Are the magnetic field lines in the picture correct?

• Yes, because they point from north to south.

• No, because they point from north to south (they're supposed to go the other way).

• Yes, because the North pole is on the left in all pictures.

• No, because the North pole is on the left in all pictures (it's supposed to be on the right).

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NGSS.HS-PS2-5

NGSS.HS-PS3-5

The production of electric current by a changing magnetic field is called ____________________________________.

• induced current

• electromotive force

• electromagnetic induction

• internal resistance

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NGSS.HS-PS2-5

The diagram shows a simple alternating current generator. Which two possible changes would cause a larger e.m.f. to be induced.

• stronger magnets, more turns.

• weaker magnets, more turns.

• increase speed, fewer turns.

• more turns, reduce speed.

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NGSS.HS-PS2-5

NGSS.HS-PS3-5

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 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

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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

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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NGSS.HS-PS2-5

NGSS.HS-PS3-5

What direction does the wire move?

• Up

• Down

• Left

• Right

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NGSS.HS-PS2-5

NGSS.HS-PS3-5