Quiz about Electric and Magnetic Forces

Question 1

A temporary magnet with a magnetic field produced by electric current.

Accepted Answer

electromagnetic

Answer

magnetic strength

Answer

electric charge

Answer

shock

Question 2

To force something to move away or apart.

Accepted Answer

repel

Answer

attract

Answer

charge

Answer

pull

Question 3

What tells us how strong a magnet is?

Accepted Answer

magnetic strength

Answer

charged particle

Answer

magnetic field

Answer

current

Question 4

This results from an interaction between electrically charged particles.

Accepted Answer

electromagnetic force

Answer

charged particle

Answer

repel

Question 5

What type of force is holding this balloon to the wall?

Accepted Answer

Electrical

Answer

Applied

Answer

Gravitational

Answer

Magnetic

Question 6

An area where magnetic materials are attracted or repelled by the magnet.

Accepted Answer

magnetic field

Answer

corn field

Answer

electromagnetic

Question 7

A form of energy available through a conductor

Accepted Answer

electric charge

Answer

electromagnetic

Answer

magnetic charge

Question 8

A particle with either a positive or negative charge

Accepted Answer

charged particle

Answer

magnetic strength

Answer

attraction

Question 9

matter with a surplus or deficiency of electrons

Accepted Answer

charged object

Answer

electric charge

Answer

electromagnetic

Question 10

The flow of electric charge through an object

Accepted Answer

current

Answer

electromagnetic force

Answer

shocking

Question 11

In an electromagnet, coils of wire are wrapped around a magnetic object to generate a magnetic field. What the is relationship between number of coils and the strength of the magnetic field?

Accepted Answer

The more coils an electromagntic has, the stronger the magnetic field

Answer

The more coils an electromagntic has, the weaker the magnetic field

Answer

The larger the metal object, the stronger the magnetic field is

Answer

There is no relationship between number of coils and the strength of a magnetic field

Question 12

Which of the two below result in an attractive force?

Accepted Answer

A positive charge and a negative charge

Accepted Answer

A north pole and a south pole

Answer

Two negative charges

Answer

Two south poles

Answer

Two postive charges

Question 13

Static electricity is the buildup of charges between two objects. What best explains why a balloon is attracted to hair when the two have been rubbed together?

Accepted Answer

The balloon and the hair both have opposite charges

Answer

The balloon and hair both have positive charges

Answer

The balloon and the hair both have negative charges

Answer

The balloon and the hair both have neutral charges

Question 14

Two bar magnets are held close together. They are released and allowed to move freely. The bar magnets quickly come together. Which best explains why this happens?

Accepted Answer

The poles facing one another are opposite poles

Answer

The poles facing one another are both south poles

Answer

The poles facing one another are both north poles

Answer

One magnet was bigger than the other

Question 15

Frederick sets paper clips out on a table. He then takes a magnet, places it directly beneath the paper clips under the table, and moves the magnet. He finds that the paper clips move with the magnet. Why does this happen?

Accepted Answer

Magnetic forces act at a distance, even betwewn objects

Answer

Magnetic force is a repellant force

Answer

Magnetic forces act on wood, like in the table

Answer

The paper clips are feeling the gravitational force of the magnet

Question 16

To decrease the strength of a magnetic field around an electromagnet, we must

Accepted Answer

decrease the number of coils

Answer

increase the number of coils

Answer

increase the size of the iron core

Answer

decrease the size of the iron core

Question 17

A Van der Graff generator works by

Accepted Answer

Causing the outside of the metal ball to become negatively charged

Answer

Causing the outside of the metal ball to become positively charged

Answer

Causing the outside of the metal ball to become neutrally charged

Answer

Causing the outside of the metal ball to become a bar magnet

Question 18

Surrounding each magnetic is an invisible force field called

Accepted Answer

A magnetic field

Answer

Gravity

Answer

An electric field

Answer

The Force

Question 19

What is the cause of electricity?

Accepted Answer

Moving electrons

Answer

Magnetism

Answer

Gravity

Answer

Lightning

Question 20

What makes an electromagnet stronger?

Accepted Answer

Greater number of loops

Answer

Smaller number of loops

Answer

Decreasing the current

Question 21

Atoms That have a positive charge will be attracted to atoms with a _______ charge.

Accepted Answer

Negative

Answer

Positive

Answer

Neutral

Question 22

What happens to the force between two charged objects as the distance between them increases?

Accepted Answer

B) The force decreases

Answer

A) The force increases

Answer

C) The force remains the same

Answer

D) The force becomes zero

Question 23

Which of the following materials is most likely to be used as a core in an electromagnet to enhance its magnetic field?

Accepted Answer

C) Iron

Answer

A) Plastic

Answer

B) Wood

Answer

D) Glass

Question 24

In a simple electric motor, what role does the commutator play?

Accepted Answer

B) It reverses the direction of current

Answer

A) It generates electrical energy

Answer

C) It increases the voltage

Answer

D) It decreases the resistance

Question 25

Which of the following best describes the relationship between electricity and magnetism?

Accepted Answer

D) Electricity and magnetism are interrelated and can influence each other

Answer

A) They are completely unrelated phenomena

Answer

B) Electricity can create magnetism, but magnetism cannot create electricity

Answer

C) Magnetism can create electricity, but electricity cannot create magnetism

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