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