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Ch 18
Test Description: Magnetism
Instructions: Answer all questions to get your test result.
1) if a loop of wire moves in and out of a magnetic field____ is produced
A
force
B
charge
C
current
D
voltage
2) a ______ transofrmer is used near homes to achieve a voltage of120V
A
step up
B
secondary coil
C
step down
D
primary coil
3) the magnetism of a piece of magnetized iron can be weakened by
A
bending the iron
B
heating and hammering theiron
C
none of the answers are correct
D
placing it near unmagnetized iron
4) what instrument is used to trace the direction of a magnetic field
A
limestone
B
compass
C
lodestone
D
transformer
5) what material was used to make the first compass
A
iron
B
lodestone
C
limestone
D
steel
6) magnetic fields are produced by
A
gravity
B
electric charges
C
electric currents
D
water currents
7) groups of atoms that align to form small, magnetized regions in a material are
A
magnetic field lines
B
magnetic poles
C
geographic domains
D
magnetic domains
8) An example of naturally occurring magnetic rock is
A
limestone
B
soapstone
C
lodestone
D
peastone
9) when the loop of wire in an AC generator rotates halfway
A
the current continues in the same direction
B
electrical energy is converted into mechanical energy
C
maximum current is reached
D
the current reverses
10) a machine that converts mechanical energy into electrical energy
A
step down transformer
B
inductor
C
step up transformer
D
generator
*select an answer for all questions
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