Electromagnetic Induction

Question 1

Which change will cause an increase in the electric current produced through electromagnetic induction?

Revolt · Accepted Answer

using more wire loops in the solenoid

Question 2

Lionel explores electromagnetic induction using the procedure shown.1. Move the magnet quickly into the right end of a solenoid.2. Hold the magnet in the solenoid for 3 s.3. Move the solenoid slowly to the left away from the magnet.What should Lionel observe during his investigation?

Revolt · Accepted Answer

A large current forms, drops to zero, then a smaller current forms in the opposite direction.

Question 3

Four compasses are placed around a wire, as shown.

Revolt · Accepted Answer

A current does not flow in the wire.

Question 4

Joan makes the device shown in her science class.

Revolt · Accepted Answer

The field would reverse its poles.

Question 5

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

Revolt · Accepted Answer

circles around the wire that go in at the bottom of the screen and moves in a clockwise direction

Question 6

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

Revolt · Accepted Answer

moving a magnet into a coil of wire in a closed circuit

Question 7

Which changes will cause an increase in the magnetic field of a solenoid? Check all that apply.using more wire loopsusing fewer wire loopsusing a larger currentusing a smaller currentincreasing the spacing between loopsdecreasing the spacing between loops

Revolt · Accepted Answer

using more wire loops; using a larger current; decreasing the spacing between loops

Question 8

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

Revolt · Accepted Answer

bringing a compass near a wire that has an electric current

Question 9

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

Revolt · Accepted Answer

He discovered electromagnetism after seeing a compass needle deflected by a flowing electric current.

Question 10

When the north pole of a bar magnet is moved into a solenoid, the needle on a galvanometer attached to the solenoid moves to the left, indicating that a current is produced. The magnet is then pulled out at a faster speed.What will be the result?

Revolt · Accepted Answer

a larger current in the opposite direction

Electromagnetic Induction Answers

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