Applications of Electromagnetism

Question 1

Laptop computers are made with batteries, but they must also be plugged into outlets to charge the batteries. Which is true regarding laptops?

Revolt · Accepted Answer

They can run on either direct or alternating current.

Question 2

Dante drew a diagram of an electric generator.

Revolt · Accepted Answer

There should be one brush on each slip ring.

Question 3

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

Revolt · Accepted Answer

producing a path for current to flow

Question 4

The picture shows a basic diagram of an electric motor.

Revolt · Accepted Answer

X: Armature Y: Brush Z: Commutator

Question 5

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

Revolt · Accepted Answer

direct

Question 6

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 7

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

Revolt · Accepted Answer

electrical

Question 8

Which uses direct current?

Revolt · Accepted Answer

A flashlight.

Question 9

Which best compares AC and DC?

Revolt · Accepted Answer

DC flows in one direction, and AC repeatedly switches direction.

Question 10

Which reverses the flow of current through an electric motor?

Revolt · Accepted Answer

commutator

Applications of Electromagnetism Answers