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