This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

Add more coils of wire to the nail.

Reverse the poles of the magnet.

Remove all the coils and the nail.

How are electromagnets different from magnets?

you can turn an electromagnet on/off

magnets have a North and South pole

What happens when a wire is wound into a coil around an iron core in an electromagnet?

the magnetic field becomes stronger

the magnetic field becomes weaker

This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

Add more coils of wire to the nail.

Reverse the poles of the magnet.

Remove all the coils and the nail.

What are three ways to make an electromagnet stronger?

1. add more coils of wire around the iron core 2. add more electricity flowing through the wire 3. wrap a thicker wire around the core.

1. add more coils of wire around the iron core 2. add more electricity flowing through the wire 3. wrap a thinner wire around the core

1. add less coils of wire around the iron core 2. add more electricity flowing through the wire 3. wrap a thinker wire around the core

1. add more coils of wire around the iron core 2. add less electricity flowing through the wire 3. wrap a thicker wire around the core

How do like poles interact with each other? (north to north)

Throw a toaster into a bathtub.

When you put the poles of two magnets together they will either attract or repel each other. Which of these sentence is correct?

If the two poles are the same the magnets repel each other.

If the two poles are the same the magnets attract each other.

If the two poles are different the magnets repel each other.

What is an electromagnet?

a magnet that creates an electric current

a device that created electricity

a magnet that creates kinetic energy

When a magnet is able to move freely, its North pole will

point to the Earth's magnetic North pole

point to the Earth's South pole

point to the Earth's geographic North pole

When magnetic field lines are drawn, how do they look?

curved lines from N to S pole and outwards

lines extending outward in all directions like drawing the Sun

What's the difference between a solenoid and an electromagnet?

Electromagnets include a nail inside the coils.

Solenoids do not use a power source.

Solenoids include a nail inside the coils.

Which will make an electromagnet WEAKER?

remove one of the nails from the coils

If two magnetic South poles are brought near each other, what would the magnetic field lines look like?

the lines would move out, but then curve away from each other

the lines would connect between the poles

the lines would curve like an "S"

since South poles repel, there would not be any lines

How are electromagnets different from magnets?

you can turn an electromagnet on/off

magnets have a North and South pole

What happens if you cut a bar magnet in half?

You get two smaller magnets, each with a North and South pole

You get a North pole magnet and a South pole magnet

An invisible force that attracts electrically charged particles

Magnets & Electromagnets

Authored by Amanda Keehr

Other, Other Sciences

7th - 8th Grade

Used 42+ times

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67 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Passing a current through a piece of wire causes a magnetic field to form around the wire.

True

False

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Magnetic fields are created by moving _______.

Atoms

Protons

Electric Charges

Metals

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In order for an object to become magnetic, its electrons must ______.

Move in random order

Line up or face opposite directions

Go to opposite sides of the object

Line up or face the same direction

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The magnetic field of an electromagnet ______.

Can be turned on and off.

Is permanent.

Lasts for only one hour.

Lasts for one day.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Electricity is the flow of ____________.

Protons

Neutrons

Electrons

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When a bar magnet is broken in half, what is the result?

Two north poles

Two south poles

Two north poles and two south poles

The bar loses its magnetic properties

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A magnet's magnetic field exists ________.

Only on the north pole

Only on the south pole

On both poles

Around the entire magnet

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Magnets & Electromagnets

Passing a current through a piece of wire causes a magnetic field to form around the wire.

Magnetic fields are created by moving _______.

In order for an object to become magnetic, its electrons must ______.

The magnetic field of an electromagnet ______.

Electricity is the flow of ____________.

When a bar magnet is broken in half, what is the result?

A magnet's magnetic field exists ________.

This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

Which of the following is NOT part of an electromagnet?

Which of the following is shown in the picture?

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