GEN PHYSICS 2 FINAL EXAM

Electromagnetic induction is change in ___________________.

• surface area

• magnetic flux

• magnetic poles

• electric field

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

• Electric current would disappear

• It would produce a gravitational field

• Electric current will flow through the wire

• The magnet would explode

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___________ law says that the Induced current is proportional to the change of magnetic flux.

• Lenz's

• Ampere's

• Biot-Savart’s

• Faraday's

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Where is the strongest attraction force of the magnet?

• at the poles

• above the magnet

• in the middle

• below the magnet

What type of current is produced by a battery?

• parallel current

• direct current

• alternating current

• potential current

What creates a magnetic field?

• charged particles that do not move

• gravity

• moving electric charges

• an isolated magnetic pole

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Voltage can be induced in a wire by _______________.

• moving the wire near a magnet

• moving a magnet near the wire

• changing the current in a nearby wire

• all of these

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

• Generator

• Magnet

• Motor

• Transformer

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Magnetic Field lines around a bar magnet ____________.

• are perpendicular the magnet

• cross back and forth over each other

• spread out from north pole and curve to south

• are perfectly straight

How do Maglev trains go up to 311 MPH?

• a train is pulled by a big magnet at the end of the tracks

• magnetized coils repel magnets on the train which moves it

• electric motors push the train and cause it to levitate

• a generator creates electricity which fuels the train

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