Quiz about MAGNETIC & ELECTRIC FORCES

Question 1

a buildup of charges on an object

Accepted Answer

static electricity

Answer

electron

Answer

electric force

Answer

electric field

Answer

electric current

Question 2

the continuous flow of electrical charges through a material

Accepted Answer

electric current

Answer

electron

Answer

electric force

Answer

electric field

Answer

static electricity

Question 3

the region around a charged object where the object's electric force is exerted on other charged objects

Accepted Answer

electric field

Answer

electron

Answer

electric force

Answer

electric current

Answer

static electricity

Question 4

the force between charged objects

Accepted Answer

electric force

Answer

electron

Answer

electric field

Answer

electric current

Answer

static electricity

Question 5

a negatively-charged particle that moves around the outside of the nucleus of an atom

Accepted Answer

electron

Answer

electric force

Answer

electric field

Answer

electric current

Answer

static electricity

Question 6

any object that attracts iron and materials that contain iron

Accepted Answer

magnet

Answer

magnetic force

Answer

magnetic pole

Answer

magnetic field

Question 7

the region around a magnet where the magnetic force is exerted

Accepted Answer

magnetic field

Answer

magnet

Answer

magnetic force

Answer

magnetic pole

Question 8

a force produced when magnetic poles interact

Accepted Answer

magnetic force

Answer

magnet

Answer

magnetic pole

Answer

magnetic field

Question 9

either end of a magnetic object, where the magnetic force is strongest

Accepted Answer

magnetic pole

Answer

magnet

Answer

magnetic force

Answer

magnetic field

Question 10

Charges flow through a circuit due to differences in ___.

Accepted Answer

potential energy

Answer

resistance

Answer

conductivity

Answer

insulation

Question 11

Why would two electrons repel each other if they were close together?

Accepted Answer

They have like charges, so they experience a repulsive force.

Answer

They have like charges, so they experience an attractive force.

Answer

They have opposite charges, so they experience a repulsive force.

Answer

They have opposite charges, so they experience an attractive force.

Question 12

Which of the following best describes each atomic particle?

Accepted Answer

Protons are positive, neutrons are neutral, and electrons are negative.

Answer

Protons are negative, neutrons are neutral, and electrons are positive.

Answer

Protons are neutral, neutrons are positive, and electrons are negative.

Answer

Protons are neutral, neutrons are negative, and electrons are positive.

Question 13

Why do some materials allow electricity to flow through while others do not?

Accepted Answer

Electricity will flow if the electrons are bound loosely to their atoms in the material.

Answer

Electricity will flow if the atoms in the material are bound tightly to each other.

Answer

Electricity will flow if the atoms in the material are bound loosely to each other.

Answer

Electricity will flow if the electrons are bound tightly to their atoms in the material.

Question 14

Which of the following is true about the potential energy between charged particles?

(SELECT TWO ANSWERS)

Accepted Answer

Potential energy increases as opposite charges move apart.

Accepted Answer

Potential energy decreases as opposite charges get closer together.

Answer

Potential energy remains the same between like charges as they move apart.

Answer

Potential energy increases as any charges move closer together.

Question 15

What types of material attract a magnet?

Accepted Answer

materials that contain iron

Answer

materials containing any type of metal

Answer

materials that are shiny

Answer

materials that are nonmetallic

Question 16

Where are the strongest and weakest parts of the magnetic field shown in the diagram?

Accepted Answer

strongest: C, weakest: B

Answer

strongest: A, weakest: B

Answer

strongest: A, weakest: D

Answer

strongest: C, weakest: A

Question 17

Which of the following statements describes the similarities between electric and magnetic fields?

Accepted Answer

Opposite charges and poles are always attracted to each other.

Answer

The field lines in both magnetic and electric fields are always straight.

Answer

Each charged particle and magnet have both a positive and negative side.

Answer

The potential energy increases as like charges or poles get farther apart.

Question 18

How does the magnetic field protect life on Earth?

Accepted Answer

The magnetic field directs charged particles toward the poles and then past Earth.

Answer

The magnetic field directs charged particles toward the equator and then past Earth.

Answer

The magnetic field absorbs the charged particles coming from the sun.

Answer

The magnetic field directs charged particles toward the poles then absorbs them.

Question 19

A student accidentally breaks a magnet during a lab. Which of the following statements may the student find to be true about the broken magnet?

(SELECT TWO ANSWERS)

Accepted Answer

Both pieces of the magnet have north and south poles.

Accepted Answer

There is an attractive magnetic force between the two pieces where they broke.

Answer

The broken pieces of the magnet are no longer magnetic.

Answer

Each broken piece of the magnet retains only one pole.

Question 20

Which of the following BEST explains why the person is about to experience a shock when they touch the doorknob?

Accepted Answer

The negative charges repel each other, allowing the negative charges in the finger and positive charges in the doorknob to interact.

Answer

The negative charges attract each other, allowing the negative charges in the finger and positive charges in the doorknob to interact.

Answer

The negative charges repel each other, allowing the positive charges in the finger and positive charges in the doorknob to interact.

Answer

The negative charges repel each other, allowing the negative charges in the finger and negative charges in the doorknob to interact.

Question 21

A student performs an experiment to test materials for their ability to readily gain or lose negative charges when rubbed with wool. She brings each material (after being rubbed with wool) close to a negatively charged balloon and records what happens in a table.

Based on the information in this table, which material became negatively charged after rubbing it with the wool?

Accepted Answer

vinyl

Answer

fur

Answer

glass

Answer

steel

Question 22

A student performs an experiment to test materials for their ability to readily gain or lose negative charges when rubbed with wool. She brings each material (after being rubbed with wool) close to a negatively charged balloon and records what happens in a table.

Based on the information in this table, which materials became positively charged after rubbing it with the wool? SELECT TWO.

Accepted Answer

fur

Accepted Answer

glass

Answer

steel

Answer

vinyl

Question 23

Which of the following are TRUE about Earth's magnetic field? SELECT TWO.

Accepted Answer

Earth's magnetic field is generated by its iron-and-nickel core.

Accepted Answer

Earth's magnetic field protects life on Earth from solar winds.

Answer

Earth's geographic North Pole is also its magnetic north pole.

Answer

Earth's magnetic field is weakest near Earth's North and South Poles.

Question 24

Both magnetic and electric field lines, like those shown in the diagram, represent what? SELECT TWO.

Accepted Answer

the direction of forces

Accepted Answer

the magnitude of forces

Answer

the acceleration of forces

Answer

the speed of forces

Question 25

How does separating two magnets, as shown in the diagram, affect the energy in the system?

Accepted Answer

Separating the magnets increases potential energy.

Answer

Separating the magnets increases kinetic energy.

Answer

Separating the magnets decreases potential energy.

Answer

Separating the magnets decreases the electric energy.

Question 26

A student wants to demonstrate a "magic" trick to her friends. After rubbing a balloon on her hair, she places the balloon near an empty soda can, and the soda can "magically" rolls towards the balloon! Which of the following is NOT TRUE about this "magic" trick?

Accepted Answer

The balloon gained protons when it was rubbed against the student's hair.

Answer

The overall charge of the balloon is negative.

Answer

The negatively charged balloon attracts the positively charged soda can.

Answer

Placing the balloon closer to the soda can will increase the electric force.

Question 27

Which of the following would NOT increase the magnitude of the electric force between the positively and negatively charged objects?

Accepted Answer

increasing the distance between the charged objects

Answer

increasing the amount of positive charges

Answer

increasing the amount of negative charges

Answer

decreasing the distance between the charged objects

Question 28

A student was organizing his notes comparing electric and magnetic forces. Which of the following would be included in his notes?

Accepted Answer

The strength and direction of magnetic and electric forces are both represented by field lines.

Answer

Magnetic force is a noncontact force, but electric force is a contact force.

Answer

Opposite poles cause an attractive force, but opposite charges cause a repulsive force.

Answer

Separating opposite poles or opposite charges decreases potential energy.

Question 29

How is a magnet able to pick up bits of metal without actually touching them?

Accepted Answer

There is an invisible magnetic field around the magnet where it exerts magnetic force.

Answer

The magnet is surrounded by an electric field that attracts the metal.

Answer

The metal exerts a repulsive force on the magnet.

Answer

The electric force from the magnet attracts the bits of metal.

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