AnswersTX-Physics CRLab: Circuit Design

Electromagnetic Induction Answers

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1
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Joan makes the device shown in her science class.

Question illustration
A
The field would stop.
B
The field would get stronger.
C
The field would reverse its poles.
D
The field would get weaker.
2
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Which change will cause an increase in the electric current produced through electromagnetic induction?

A
using more wire loops in the solenoid
B
using the opposite pole of the magnet
C
using a weaker magnet
D
moving the solenoid slower
3

Craig is modeling the discovery of electromagnetism. Which procedure should he use?

A
moving a magnet into a coil of wire in a closed circuit
B
moving a magnet into a coil of wire in an open circuit
C
bringing a compass near a wire that has no electric current
D
bringing a compass near a wire that has an electric current
4

A wire has a current that flows to the right.Which describes the magnetic field produced by the current?

A
straight lines along the wire to the right moving the same direction of the current
B
straight lines along the wire to the left moving the opposite direction of the current
C
circles around the wire that go in at the top of the screen and moves in a counterclockwise direction
D
circles around the wire that go in at the bottom of the screen and moves in a clockwise direction
5

Which change would reverse the direction of the electric current generated through electromagnetic induction?

A
moving the magnet slower
B
using more loops of wire in the solenoid
C
using the opposite pole of the magnet
D
using a weaker magnet
6

Which describes Hans Oersted’s work with electricity and magnetism?

A
He discovered electromagnetic induction after seeing a compass needle deflected by a flowing electric current.
B
He discovered electromagnetism after seeing a compass needle deflected by a flowing electric current.
C
He discovered electromagnetic induction after seeing a changing magnetic field generate an electric current.
D
He discovered electromagnetism after seeing a changing magnetic field generate an electric current.
8

Tonya is modeling the discovery of electromagnetic induction. Which procedure should she use?

A
moving a magnet into a coil of wire in a closed circuit
B
moving a magnet into a coil of wire in an open circuit
C
bringing a compass near a wire that has no electric current
D
bringing a compass near a wire that has an electric current
9

An electric current is produced using a bar magnet and a solenoid.Which changes will cause a decrease in the electric current produced? Check all that apply.

A
using more wire loops in the solenoid
B
using fewer wire loops in the solenoid
C
using a stronger magnet
D
moving the solenoid instead of the magnet
E
moving the magnet more slowly
10

The table lists information about four devices.Which lists the devices in order from greatest magnetic field strength to weakest?

Question illustration
A
W, X, Y, Z
B
W, Z, Y, X
C
X, Z, Y, W
D
X, Y, Z, W

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