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