Quiz about Magnetic, Electric and Gravitational Forces Test 2025

Question 1

This is an image of a magnet showing the magnetic field.

Where is the magnetic force the strongest?

Accepted Answer

Position C

Answer

Position A

Answer

Position B

Answer

Position D

Question 2

Joe has an idea to cut a bar magnet in half so that he can have one magnet with a north pole and one magnet with a south pole. What is wrong with this idea?

Accepted Answer

It is impossible to create a magnet with only one magnetic pole.

Answer

It is impossible to cut a magnet in half.

Answer

It is impossible to create an extremely small magnet.

Answer

It is impossible to separate two opposite magnetic poles once they are in contact with each other.

Question 3

Which of the following best describes a magnetic field?

Accepted Answer

a region around a magnet in which you can measure magnetic forces

Answer

measure of the length of a magnet

Answer

the force that pushes two magnets away from each other

Answer

an invisible region that surrounds the north pole of a magnet

Question 4

The picture below shows magnet 2 being pushed toward magnet 1. Which of the following will most likely happen to magnet 1 as magnet 2 is moved closer?

Accepted Answer

Magnet 1 will move away from magnet 2.

Answer

Magnet 1 will move under magnet 2.

Answer

Magnet 1 will move toward magnet 2.

Answer

Magnet 1 will move on top of magnet 2.

Question 5

Use the image to answer this question. What generalization can you make about the attraction between the magnets on the left?

Accepted Answer

They are repelling each other.

Answer

They are polarized.

Answer

They are attracted to each other.

Answer

They are electrically charged.

Question 6

Look at the diagram of the bar magnets. What will happen to the force between the two magnets if they are pulled further apart?

Accepted Answer

The force would be weaker.

Answer

The force would be stronger.

Answer

The force would stay unchanged.

Answer

The force would reverse the poles.

Question 7

Iron filings and bar magnets were placed on a sheet of paper. The following diagram shows the pattern made on the paper. At which location is the magnetic field the strongest?

Accepted Answer

4

Answer

1

Answer

2

Answer

3

Question 8

What is the name of the attractive force that acts between any two bodies (objects) in our universe?

Accepted Answer

Gravitational force

Answer

Coulomb attractive force

Answer

Magnetic force

Answer

Electrical force

Question 9

Two factors affecting the size of the force of gravity between 2 objects are

Accepted Answer

Mass and distance

Answer

Mass and matter

Answer

Distance and weight

Answer

Weight and mass

Question 10

The farther apart two objects are, the ____ their gravitational forces.

Accepted Answer

weaker

Answer

stronger

Answer

more equal

Question 11

When placed at equal distances apart, the greatest gravitational attraction will be between two

Accepted Answer

school buses

Answer

skateboards

Answer

bowling balls

Answer

marbles

Question 12

Two objects have a certain gravitational force between them. What would happen if the mass of one of the objects suddenly increased?

Accepted Answer

The gravitational force between the two objects would increase.

Answer

The mass of the other object would increase.

Answer

The distance between the objects would increase.

Answer

The gravitational force of the objects would remain constant.

Question 13

The objects shown in the following diagrams have different masses and are different distances apart. Which diagram shows the two objects that have the greatest gravitational force between them?

Accepted Answer

Option C is correct

Answer

A.

Answer

B.

Answer

D.

Question 14

When Bethany walks across a carpet, her socks pick up many negative electric charges. Later in the day, these negative charges are no longer present on her socks. What most likely happened to the negative charges?

Accepted Answer

The charges transferred to another object.

Answer

The charges disappeared.

Answer

The charges switched from negative to positive.

Answer

The charges broke apart into smaller positive and negative particles.

Question 15

This image shows two circular objects. Each object has an electric charge, as shown. What will happen to these objects when they are placed near each other?

Accepted Answer

The objects will move away from each other.

Answer

The objects will remain still.

Answer

The objects will both move to the left.

Answer

The objects will move towards each other.

Question 16

Each diagram shows two pith balls (foam balls coated with aluminum) hanging from strings. A pith ball can be given a positive (+) or a negative (-) electrical charge. Which of the following diagrams shows a correct way in which the charged balls will be attracted to or repelled by each other?

Accepted Answer

Option C is correct

Answer

A.

Answer

B.

Answer

D.

Question 17

A balloon is rubbed with a piece of cloth. As a result, the balloon has a negative charge. What has happened?

Accepted Answer

Electrons have traveled from the cloth to the balloon.

Answer

Electrons have moved from the inside to the outside of the balloon.

Answer

Positive charges have traveled from the balloon to the cloth.

Answer

Electrons have moved from the balloon to the cloth.

Question 18

A charged object (A) comes into contact with an uncharged object (B). In the process, object A loses electrons and object B gains electrons. Which of the following is true?

Accepted Answer

Object B now has a negative charge.

Answer

Object B lost protons.

Answer

Object B now has no charge.

Answer

Object B now has a positive charge

Question 19

A balloon has a negative charge. A glass rod has a positive charge, as shown below. What will happen when the glass rod is brought near the balloon?

Accepted Answer

The balloon will be attracted to the rod.

Answer

The balloon will be repelled by the rod.

Answer

The balloon will remain in place.

Answer

The balloon will spin in circles.

Question 20

In this picture, how is electric charge being transferred?

Accepted Answer

Charged by friction

Answer

Charged by conduction

Answer

Charged by induction

Answer

Charged by transduction

Question 21

In this picture, how is electric charge being transferred?

Accepted Answer

Charged by induction

Answer

Charged by conduction

Answer

Charged by friction

Answer

Charged by transduction

Question 22

Objects can be charged in many ways. In the image, a student is rubbing a balloon on his head. What method is he using to charge the balloon?

Accepted Answer

Friction

Answer

Induction

Answer

Repulsion

Answer

Conduction

Question 23

Two electrically charged objects come into contact with each other. When they touch, electrons transfer from the more negative object to the less negative object until they both have the same charge. What type of static charge transfer is happening in this scenario?

Accepted Answer

conduction

Answer

friction

Answer

induction

Answer

repulsion

Question 24

Some of the materials for a laboratory experiment are copper wire, plastic tubing, and a pair of cotton gloves. Why is the copper wire the best electrical conductor in this group of materials?

Accepted Answer

Copper wire allows electric charges to flow easily through it.

Answer

Copper wire is easy to bend.

Answer

Copper wire resists the flow of charged particles.

Answer

Copper wire can withstand very high temperatures.

Question 25

How are electromagnets different from magnets?

Accepted Answer

You can turn an electromagnet on/off

Answer

Magnets can be turned on/off

Answer

Magnets are more powerful

Question 26

What would increase the strength of an electromagnet?

Accepted Answer

Increasing the amount of current flowing through the wire

Answer

Changing the direction of the current

Answer

Inserting a wooden core inside

Answer

Decreasing the numbers of coils of wire

Question 27

The distance between two charges is represented by d. In which of the following diagrams is the attractive force between the two charges the greatest?

Accepted Answer

Option B is correct

Answer

A.

Answer

C.

Answer

D.

Question 28

The diagram shows four charged objects: A, B, C, and D. Based on the diagram, which statement is true?

Accepted Answer

The electric force between A and B is greater than the electric force between C and D.

Answer

The electric force between A and B is identical in magnitude (size) to the electric force between C and D.

Answer

The electric force between A and B is smaller than the electric force between C and D.

Answer

The electric force between A and B is canceled by the electric force between C and D.

Question 29

The interaction between electricity and magnetism has been an important topic in 20th century science. Which term describes this interaction?

Accepted Answer

Electromagnetism

Answer

Ferromagnetic

Answer

Magnetic field

Answer

Static electricity

Question 30

Daniel has a long piece of copper wire. He shapes the wire into a coil. What could Daniel do to cause electric current to flow through the wire?

Accepted Answer

connect the two free ends of the wire to a power source so that they form a closed path.

Answer

shake the wire very quickly

Answer

submerge the wire into a pan of hot water

Answer

move a bar magnet in and out of the wire coil

Question 31

The picture below shows a generator used to produce electricity. Electricity is produced in a generator by changing _____________ energy into __________________ energy.

Accepted Answer

Mechanical; Electrical

Answer

Electrical; Mechanical

Answer

Steam; Light

Answer

Magnetic; Mechanical

Question 32

The picture is a diagram of a simple electric motor. Electricity is produced in a motor by changing _________________ energy into _____________ energy.

Accepted Answer

Electrical; Mechanical

Answer

Mechanical; Electrical

Answer

Steam; Light

Answer

Magnetic; Mechanical

Question 33

Which of the following electromagnets would have the greatest magnetic field?

Accepted Answer

Option D is correct

Answer

A.

Answer

B.

Answer

C.

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