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Multiple Choice Quiz
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1
Wherever an electric current exists, a magnetic field cannot exist.
A)True
B)False
2
Unlike magnetic poles create a force of attraction.
A)True
B)False
3
Materials such as copper, brass, and aluminum are called ferro-magnetic materials.
A)True
B)False
4
When a magnetic material is put in a magnetic field of a magnet, it becomes magnetized.
A)True
B)False
5
Magnetomotive force is the force that creates flux.
A)True
B)False
6
Most demagnetizing is done by
A)hammering on the magnet
B)heating the magnet to a very high temperature
C)using a coil and an ac source
D)freezing the magnet
7
The flux that remains in a temporary magnet after it is removed from a magnetic field is called
A)fundamental magnetism
B)temporary magnetism
C)internal magnetism
D)residual magnetism
8
The polarity of an induced voltage depends on
A)the direction of motion of the conductor only
B)the direction of the flux only
C)both the direction of the motion of the conductor and direction of flux
D)the size of the conductor
9
The ability of a material to conduct flux is referred to as
A)conductivity
B)permeability
C)susceptibility
D)magnetism
10
The direction of the flux around a conductor can be determined by using
A)flux measurements
B)Ohm's law
C)the left-hand rule
D)the right-hand rule





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