Applications of Electromagnetism — Quiz

Question 1

Which reverses the flow of current through an electric motor?

Revolt · Accepted Answer

commutator

Question 2

The left side of the armature in an electric motor is pushed down. When the current changes direction, how is the motion of the armature affected?

Revolt · Accepted Answer

It is pulled up on the left side.

Question 3

An electric generator converts kinetic energy into which kind of energy?

Revolt · Accepted Answer

electrical

Question 4

What is the function of the slip rings in an electric generator?

Revolt · Accepted Answer

producing a path for current to flow

Question 5

Which best contrasts electric doorbells and audio speakers?

Revolt · Accepted Answer

Speakers involve rapid changes in the direction of current, and doorbells do not.

Question 6

Which type of current flows in only one direction and is produced by a battery?

Revolt · Accepted Answer

direct

Question 7

What is the function of an electromagnet in an electric doorbell?

Revolt · Accepted Answer

It attracts a metal striker, which then hits the bell.

Question 8

Which current is produced in homes?

Revolt · Accepted Answer

alternating

Question 9

Helen adjusts the armature of an electric generator by increasing the number of coils around the iron core. What is Helen most likely trying to do?

Revolt · Accepted Answer

increase the amount of current

Question 10

An electric motor converts electrical energy into which kind of energy?

Revolt · Accepted Answer

kinetic

Applications of Electromagnetism — Quiz Answers