Which statement is true?

The light bulb will not light up because the circuit is broken.

The light bulb will light up because the circuit is complete.

The light bulb will light up because the circuit is broken.

The light bulb will not light up because the circuit is complete.

In a parallel circuit if one of the light bulbs burns out the rest _________.

of the light bulbs burn out also

Will the light bulb light up if the switch remains open as shown?

No, because the electric circuit is not complete.

Yes, because the circuit will be complete.

Yes, because the battery will push the electric current.

No, because the battery will push the electric current.

Sarah planned an investigation to test the strength of electromagnets. In one electromagnet she used two batteries and a small core. In the other electromagnet she used one battery and a thicker core. Was this a fair test?

No, because she changed more than one variable.

No, because the number of batteries does not matter.

Yes, because the number of batteries does not matter.

Yes, because she tested the correct number of variables.

How are electromagnets different from magnets?

you can turn an electromagnet on/off

magnets have a North and South pole

Sally is creating a model to show what happens when electricity is used. She decided to show the motor spinning below as her model. How could she best explain what is happening?

Electric energy is transformed into energy of motion.

Heat energy is transformed into energy of motion.

Heat energy is transformed into electric energy.

Electric energy is transformed into light energy.

Increasing the electric current in the wire is one way to

A. strengthen a solenoid’s magnetic field.

B. make an electromagnet become a solenoid.

C. make a solenoid become an electromagnet.

D. weaken a solenoid’s magnetic field.

Increasing the number of loops in the coils of a solenoid is one way to

B. strengthen the solenoid’s magnetic field.

A. increase the wire’s electric current

C. decrease the wire’s electric current.

D. weaken the solenoid’s magnetic field.

A student created the model of an electromagnet shown below. How could she best explain why the paper clip stuck to the nail?

The electric current in the circuit magnetized the nail.

The electric current in the circuit melted the nail.

The nail heated up causing it to become a magnet.

If two negative charges are held close together and then released, the charges will

accelerate away from each other.

move at a constant speed away from each other

What would increase the strength of an electromagnet?

Increasing the amount of current flowing through the wire.

Inserting a wooden core inside the coil

Changing the direction of the current

Decreasing the number of coils of wire

Electricity and Magnetism

Authored by Kelly Huckaby

Physics

8th Grade

NGSS covered

Used 92+ times

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51 questions

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

____________ allows electricity to flow.

A conductor

An insulator

A magnet

switch

MULTIPLE CHOICE QUESTION

1 min • 1 pt

____________ stops the flow of electricity.

A conductor

An insulator

A magnet

switch

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

To complete a circuit the switch must be

unattached

open

closed

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

When the switch is closed, the light

comes on

stays off

burns out

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is one problem with using a series circuit?

It has a lot of series.

If one goes down, they all go down!

It doesn't work properly.

There are no problems.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is one benefits of using a parallel circuit?

It gets confusing.

There are no problems.

If one goes down, it does not affect the others.

It uses less wiring.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A flow of electrons through a conductor is called:

A river

A spark

An electron flow

A current

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Electricity and Magnetism

____________ allows electricity to flow.

____________ stops the flow of electricity.

To complete a circuit the switch must be

When the switch is closed, the light

What is one problem with using a series circuit?

What is one benefits of using a parallel circuit?

A flow of electrons through a conductor is called:

What kind of circuit is this?

What kind of circuit is this?

What kind of circuit is this?

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