When you observe, you

All of the answers are correct.

To make a simple electromagnet you need:

a copper wire, a nail, and a battery.

the area of push or pull around a magnet.

An electric generator transforms:

mechanical energy into electric energy.

How is an electromagnet different from a regular magnet?

All of the answers are correct.

to change from one form to another.

converts electric energy to mechanical energy.

Why can't the nail and wire pick up the metal objects any longer?

The magnetic field got weaker once electricity was removed.

In the simple electromagnet we made, the battery was needed to:

supply the electricity (electric current).

How did the nail and wire become a magnet?

The nail and wire were magnetized by electricity.

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Electromagnets, Motors, and Generators

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Review of vocabulary words and concepts of electromagnets, motors, and generators for middle school

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Questions 15

Answers

1
When you observe, you
Use your nose to smell.
Use your eyes to look at and your ears to listen.
All of the answers are correct.
Use your hands to touch.
2
The south pole and north pole of a magnet will
pull and repel each other.
push and attract each other.
pull and attract each other.
push and repel each other.
3
To make a simple electromagnet you need:
a copper wire and a nail.
a copper wire, a nail, and a light bulb.
a copper wire, a nail, and a battery.
a copper wire.
4
A magnetic field is
the sound waves in the air.
the area of heat around a magnet.
the area of push or pull around a magnet.
None of the answers are correct.
5
An electric generator transforms:
mechanical energy into magnets.
mechanical energy into electric energy.
water into gas.
electric energy into mechanical energy.
6
How do you control the strength of an electromagnet?
All answers are correct.
Use a longer nail
You can add more coils to the wire.
You can increase the source of electricity (battery).
7
How is an electromagnet different from a regular magnet?
You can control the strength of the magnet.
It is man made.
All of the answers are correct.
You can turn it on and off.
8
A transformation is:
to make or produce something.
to stir something.
to change from one form to another.
to produce magnetism.
9
An electric motor:
transforms magnets.
converts electric energy to mechanical energy.
all answers are correct.
converts mechanical energy to electric energy.
10
Why can't the nail and wire pick up the metal objects any longer?
The copper wire got too hot.
The magnetic field got stronger because of electricity.
The nail got too hot.
The magnetic field got weaker once electricity was removed.
11
In the simple electromagnet we made, the battery was needed to:
make the magnet heavy.
supply the electricity (electric current).
make the magnet pretty.
supply the heat.
12
Electric energy is created by
the light of the moon.
potential energy.
winning the Stanley Cup.
the movement of electrons.
13
The definition of generate is:
to repel.
to attract.
to change from one form to another.
to make or produce.
14
How did the nail and wire become a magnet?
The wire pulled at the paperclips.
The nail is made of iron so it attracts.
It's magic!
The nail and wire were magnetized by electricity.
15
The north pole and north pole of a magnet will
attract and repel each other.
push and attract each other.
push and pull each other.
push and repel each other.

Electromagnets, Motors, and Generators Flashcards | StudBud