Quiz about Field Forces

Question 1

Magnetic field lines are closet together at the __________.

Accepted Answer

poles

Answer

lines

Question 2

The motion of liquid _______ in the Earth's core creates a magnetic field.

Accepted Answer

Iron

Answer

Magnesium

Question 3

A(n) __________ is a device that has a magnetized needle that can spin freely.

Accepted Answer

Compass

Answer

Magnetic Field

Question 4

repel

Accepted Answer

to push objects away from each other

Answer

to provide evidence that goes against a claim

Answer

an object, diagram, or computer program that helps us

Answer

when two objects come close together

Question 5

Where is the force of attraction the strongest on a magnet?

Accepted Answer

at the poles

Answer

in the middle

Answer

above the magnet

Answer

below the magnet

Question 6

magnetic field

Accepted Answer

the space around a magnet in which magnetic forces can act on objects

Answer

to separate or set apart

Answer

one of the two opposite ends of a magnet

Answer

to provide evidence that goes against a claim

Question 7

Attract

Accepted Answer

To pull objects close to each other

Answer

to push objects away from each other

Answer

to change from one type to another

Answer

an electric current

Question 8

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 9

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 10

Which of the following most closely resembles an electromagnetic?

Accepted Answer

Option B is correct

Answer

A.

Answer

C.

Answer

D.

Question 11

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 12

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 13

Surrounding each magnetic is an invisible force field called

Accepted Answer

A magnetic field

Answer

Gravity

Answer

An electric field

Answer

The Force

Question 14

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 15

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 16

What is the cause of electricity?

Accepted Answer

Moving electrons

Answer

Magnetism

Answer

Gravity

Answer

Lightning

Question 17

The charge on the left is ____ and the charge on the right is ___

Accepted Answer

positive ; negative

Answer

positive ; positive

Answer

negative ; negative

Answer

negative ; positive

Question 18

When two magnets repel, they ________________

Accepted Answer

push apart

Answer

change color

Answer

pull together

Answer

get colder

Field Forces

18 questions