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Electromagnetism
Test Description: 8th grade electromagnetism
Instructions: Answer all questions to get your test result.
1) The region around a magnet in which magnetic forces can act is called the...
A
pole
B
domain
C
magnetic field
D
solenoid
2) An electric fan has an electric motor inside to change...
A
electrical energy into thermal energy
B
thermal energy into electrical energy
C
kinetic energy into electrical energy
D
electrical energy into kintic energy
3) The marked end of a compass needle always points directly to...
A
a magnet's north pole
B
a magnet's south pole
C
Earth's geographic North Pole
D
Earth's geographic South Pole
4) Which of the following is NOT true about an electromagnet?
A
Its strength is reduced by adding more loops
B
It can be strong enough to levitate a train
C
The current may be turned on or off
D
It consists of an iron core and a current-carrying wire
5) All magnets...
A
are surrounded by a magnetic field
B
exert forces
C
have two poles
D
All of the above
6) The magnetic effects of a bar magnet are...
A
evenly distributed throughout a magnet
B
None of the above
C
concentrated near the ends
D
distributed randomly in a magnet
7) Sometimes the magnetic strip on a credit card becomes demagnetized. This strip is most likely a (n)
A
permanent magnet
B
geomagnet
C
electromagnet
D
temporary magnet
8) If you attach a magnet to a string so that the magnet is free to rotate, you will see that one end of the magnet will point...
A
southwest
B
west
C
north
D
east
9) The pole of a magnet that points to the north is called the magnet's...
A
west pole
B
north pole
C
east pole
D
south pole
10) The force of repulsion or attraction between the poles of magnets is called the...
A
magnetic force
B
Coulomb force
C
gravitational force
D
Foucault force
*select an answer for all questions
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