Unit Test — Unit test

Question 1

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 2

Pedro uses a bar magnet to pick up a nail. He then touches the tip of the nail to some staples.

Revolt · Accepted Answer

The nail has become a temporary magnet, while the bar magnet remains a permanent magnet.

Question 3

The voltage across the primary winding is 350,000 V, and the voltage across the secondary winding is 17,500 V. If the secondary winding has 600 coils, how many coils are in the primary winding?

Revolt · Accepted Answer

12,000 coils

Question 4

What must be known to determine the direction of the magnetic force on a charge? Check all that apply.the type of the chargethe amount of the chargethe direction of the magnetic fieldthe velocity of the chargethe strength of the magnetic field

Revolt · Accepted Answer

the type of the charge; the direction of the magnetic field; the velocity of the charge

Question 5

Which describes Michael Faraday’s work with electricity and magnetism?

Revolt · Accepted Answer

He discovered electromagnetic induction after seeing a changing magnetic field generate an electric current.

Unit Test — Unit test Answers

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