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Ch 18
Test Description: Magnetism
Instructions: Answer all questions to get your test result.
1) the north pole of one magnet will be attracted to
A
the middle of the magnet
B
another north pole
C
a south pole
D
all
2) magnetic force
A
all of the answers are correct
B
acts at a distance
C
is strongest near a magnet's poles
D
is a field force
3) pushing a loop of wire through a magnetic field requires work. The greater the magnetic field
A
the stronger the force required to push the loop through the magnetic field
B
the less will be the electromagnetic induction
C
the less the force required to push the loop through the magnetic field
D
the more the loop will rotate
4) generators convert
A
chemical energy to electrical energy
B
electrical energy to chemical energy
C
mechanical energy to electrical energy
D
electrical energy to mechanical energy
5) when a wire is moving parallel to a magnetic field
A
the same current is induced as if it were perpendicular to the field
B
no current is induced in the wire
C
maximum current is induced in the wire
D
an alternating current is induced
6) the north poles of two different magnets will ____ one another
A
none of the above
B
cancel
C
repel
D
attract
7) earth's magnetic field lines run from
A
magnetic east to magnetic west
B
magnetic north to mangentic south
C
geographic south to geographic north
D
geographic east to geographic west
8) a device that produces a magnetic field by wrapping a wire into a coil is a
A
domain
B
pole
C
bar magnet
D
solenoid
9) increasing the number of coils in a solenoid or an electromagnet results in a _____ magnetic field
A
perpendicular
B
stronger
C
weaker
D
parallel
10) a solenoid with a soft iron core is called
A
pole
B
electromagnet
C
solenoid
D
bar magnet
*select an answer for all questions
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