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WorksheetsElectromagnet Strength
Total questions: 10
Worksheet time: 24mins
Name
Class
Date
1.
What is an electromagnet?
a)
a temporary magnet made from current carrying wire around a magnetic metal core.
b)
a permanent magnet with a north and south pole
2.
This is a picture of a simple electromagnet. How can the electromagnet be made stronger?
a)
Add more coils of wire to the nail.
b)
Use a smaller battery.
c)
Reverse the poles of the magnet.
d)
Remove all the coils and the nail.
3.
Which of the following is NOT part of an electromagnet?
a)
Wire
b)
Iron
c)
Toothpick
d)
Power source
4.
How are electromagnets different from magnets?
a)
magnets can be turned on/off
b)
you can turn an electromagnet on/off
c)
magnets are more powerful
d)
magnets have a North and South pole
5.
Surrounding every magnet is a __________ __________.
a)
magnetic field
b)
electrical current
c)
another magnet
6.
While electric current is flowing through a wire, what surrounds the wire?
a)
a magnetic field
b)
a glowing light
c)
neutrons
d)
protons
7.
What would increase the strength of an electromagnet?
a)
Increasing the amount of current flowing through the wire.
b)
Inserting a wooden core inside the coil
c)
Changing the direction of the current
d)
Decreasing the number of coils of wire
8.
You can make an electromagnet stronger by: having a __________________ current in the wire
a)
smaller
b)
larger
c)
greener
d)
water
9.
The strength of the magnetic field of a electromagnet can be increased by
a)
Decreasing the number of coils.
b)
Increasing the number of coils
c)
Decreasing the current
d)
Increasing the resistance
10.
What is the metal center of an electromagnet called?
a)
The current
b)
The wire
c)
The coil
d)
The ferromagnetic core
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