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

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

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

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

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

Which of the following best describes each atomic particle?

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

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

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

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

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

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

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

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

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

Which of the following is true about the potential energy between charged particles? (SELECT TWO ANSWERS)

Potential energy increases as opposite charges move apart.

Potential energy decreases as opposite charges get closer together.

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

Potential energy increases as any charges move closer together.

What types of material attract a magnet?

materials containing any type of metal

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

Opposite charges and poles are always attracted to each other.

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

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

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

How does the magnetic field protect life on Earth?

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

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

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

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

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)

Both pieces of the magnet have north and south poles.

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

The broken pieces of the magnet are no longer magnetic.

Each broken piece of the magnet retains only one pole.

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

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

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

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

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

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

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

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

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

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

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

Separating the magnets increases potential energy.

Separating the magnets increases kinetic energy.

Separating the magnets decreases potential energy.

Separating the magnets decreases the electric energy.

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?

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

The overall charge of the balloon is negative.

The negatively charged balloon attracts the positively charged soda can.

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

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

increasing the distance between the charged objects

increasing the amount of positive charges

increasing the amount of negative charges

decreasing the distance between the charged objects

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

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

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

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

Separating opposite poles or opposite charges decreases potential energy.

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

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

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

The metal exerts a repulsive force on the magnet.

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

MAGNETIC & ELECTRIC FORCES

Authored by Andrew Niswander

Science

8th Grade

NGSS covered

Used 7+ times

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29 questions

Show all answers

MULTIPLE CHOICE QUESTION

1 min • 1 pt

a buildup of charges on an object

electron

electric force

electric field

electric current

static electricity

MULTIPLE CHOICE QUESTION

1 min • 1 pt

the continuous flow of electrical charges through a material

electron

electric force

electric field

electric current

static electricity

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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

electron

electric force

electric field

electric current

static electricity

Tags

NGSS.MS-PS2-5

MULTIPLE CHOICE QUESTION

1 min • 1 pt

the force between charged objects

electron

electric force

electric field

electric current

static electricity

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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

electron

electric force

electric field

electric current

static electricity

Tags

NGSS.HS-PS1-1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

any object that attracts iron and materials that contain iron

magnet

magnetic force

magnetic pole

magnetic field

Tags

NGSS.MS-PS2-5

MULTIPLE CHOICE QUESTION

1 min • 1 pt

the region around a magnet where the magnetic force is exerted

magnet

magnetic force

magnetic pole

magnetic field

Tags

NGSS.MS-PS2-5

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MAGNETIC & ELECTRIC FORCES

a buildup of charges on an object

the continuous flow of electrical charges through a material

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

the force between charged objects

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

any object that attracts iron and materials that contain iron

the region around a magnet where the magnetic force is exerted

a force produced when magnetic poles interact

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

Charges flow through a circuit due to differences in ___.

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