Electromagnetism Question Preview (ID: 3695)


8th Grade Electromagnetism. TEACHERS: click here for quick copy question ID numbers.

The region around a magnet in which magnetic forces can act is called the...
a) magnetic field
b) domain
c) pole
d) solenoid

An electric fan has an electric motor inside to change...
a) kinetic energy into electrical energy
b) thermal energy into electrical energy
c) electrical energy into thermal energy
d) electrical energy into kintic energy

The marked end of a compass needle always points directly to...
a) Earth's geographic South Pole
b) Earth's geographic North Pole
c) a magnet's south pole
d) a magnet's north pole

Which of the following is NOT true about an electromagnet?
a) It can be strong enough to levitate a train
b) The current may be turned on or off
c) Its strength is reduced by adding more loops
d) It consists of an iron core and a current-carrying wire

All magnets...
a) have two poles
b) exert forces
c) are surrounded by a magnetic field
d) All of the above

The magnetic effects of a bar magnet are...
a) evenly distributed throughout a magnet
b) distributed randomly in a magnet
c) concentrated near the ends
d) None of the above

Sometimes the magnetic strip on a credit card becomes demagnetized. This strip is most likely a (n)
a) permanent magnet
b) temporary magnet
c) electromagnet
d) geomagnet

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) north
b) southwest
c) east
d) west

The pole of a magnet that points to the north is called the magnet's...
a) north pole
b) south pole
c) east pole
d) west pole

The force of repulsion or attraction between the poles of magnets is called the...
a) Coulomb force
b) Foucault force
c) magnetic force
d) gravitational force

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