Which rule explains why you would not use a brass rivet to make an electromagnet?

only iron and steel can become magnetized

electricity flows from positive to negative

You are making an electromagnet and can choose from a copper, iron or steel rivet. Which sentence is true?

You can use either iron or steel.

You can use all of them because they are all made of metal

You can only use the iron rivet.

You can only use the copper rivet.

Samuel Morse, the inventor of the telegraph had a problem. How can he increase the strength of the electromagnet in his telegraph?

wind fewer wraps of wire around core

What is most likely to happen when the switch is closed?

A magnetic field should be produced

How do electromagnets differ from regular magnets?

A. They can be turned off and on

B. Their polarity can be reversed

C. Their strength can be changed

Where does a magnetic field occur in relation to an electrified wire?

Around the entire length of wire

At either end, but not in the middle

Only the side closest to source

Only the side furthest from source

If you were to make a motor stronger, what should you do?

Disconnect the wires from the batteries

Use a wooden rod instead of a wire

In Flemings Left hand rule what does the thumb point in the direction of?

The direction of the force (movement)

The direction of the magnetic field

What will happen when these magnets are brought close together?

Both magnets will turn to the left

Both magnets will turn to the right

How is an electromagnet different from a permanent magnet?

An electromagnet's magnetism can be turned off.

An electromagnet is smaller and less powerful.

An electromagnet can be built without using metal.

An electromagnet does not attract objects containing iron.

In Flemings Left Hand Rule, in what direction does the second (middle) finger point? (The first finger is the one by your thumb

The direction of electrical current

The direction of the magnetic field

Step-up transformers...

improve the efficiency of the national grid

reduce the voltage to a safe level for the home

The diagram shows a cross-section through a simple DC motor. Select the correct statement:

The loop will rotate anticlockwise

The loop rotates the same way even if the battery is reveresed

Why might a current-carrying wire be placed between a magnetic field?

To produce a force from the interaction of magnetic fields

To increase the current from the interaction of magnetic fields

To increase the voltage from the interaction of magnetic fields

Electromagnet Webquest

Authored by Charles Martinez

Physics

5th Grade

NGSS covered

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Content View

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70 questions

Show all answers

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is an electromagnet?

a temporary magnet made from current carrying wire around a magnetic metal core.

a permanent magnet with a north and south pole

Tags

NGSS.MS-PS2-5

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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

Add more coils of wire to the nail.

Use a smaller battery.

Reverse the poles of the magnet.

Remove all the coils and the nail.

Tags

NGSS.MS-PS2-3

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following is NOT part of an electromagnet?

Wire

Iron

Toothpick

Power source

MULTIPLE CHOICE QUESTION

1 min • 1 pt

How are electromagnets different from magnets?

magnets can be turned on/off

you can turn an electromagnet on/off

magnets are more powerful

magnets have a North and South pole

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Surrounding every magnet is a .

magnetic field

electrical current

another magnet

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

MULTIPLE CHOICE QUESTION

1 min • 1 pt

While electric current is flowing through a wire, what surrounds the wire?

a magnetic field

a glowing light

neutrons

protons

Tags

NGSS.HS-PS2-5

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

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Electromagnet Webquest

What is an electromagnet?

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?

How are electromagnets different from magnets?

Surrounding every magnet is a .

While electric current is flowing through a wire, what surrounds the wire?

What would increase the strength of an electromagnet?

You can make an electromagnet stronger by: having a __________________ current in the wire

The strength of the magnetic field of a electromagnet can be increased by

What is the metal center of an electromagnet called?

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Electromagnet Webquest

What is an electromagnet?

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?

How are electromagnets different from magnets?

Surrounding every magnet is a __________ __________.

While electric current is flowing through a wire, what surrounds the wire?

What would increase the strength of an electromagnet?

You can make an electromagnet stronger by: having a __________________ current in the wire

The strength of the magnetic field of a electromagnet can be increased by

What is the metal center of an electromagnet called?

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Surrounding every magnet is a .