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Chapter 9 Electricity/magnetism
Test Description: Electricity and magnetism
Instructions: Answer all questions to get your test result.
1) A _________ circuit has multiple pathways for electricity to flow.
A
series
B
insulator
C
parallel
D
conductor
2) As resistance in a circuit increases, the flow of electric current in a circuit ____________.
A
stays the same
B
increases
C
never changes
D
decreases
3) Materials through which electric charges flow easily are called
A
insulators
B
conductors
C
generators
D
magnets
4) You can increase the strength of an electromagnet's field by
A
winding the coils more loosely
B
using a stronger ferromagnetic core
C
decreasing the number of loops in the solenoid
D
decreasing the current
5) As the temperature of a conductor increases, its resistance _____________.
A
decreases
B
stays the same
C
turns in an opposite direction
D
increases
6) If the distance between charged particles decreases, then the strength of the magnetic field
A
increases
B
decreases
C
changes direction
D
stays the same
7) The unit for measuring voltage is the
A
volt
B
amp
C
ohm
D
Newton
8) By moving a wire up and down repeatedly in a magnetic field, _________ current is produced.
A
direct
B
magnetic
C
induction
D
alternating
9) A step-up transformer _____________ voltage.
A
moves
B
has no effect on
C
increases
D
decreases
10) Increasing the number of loops on a solenoid will cause the strength of its magnetic field to
A
increase
B
decrease
C
stay the same
D
change direction
*select an answer for all questions
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