Alternating Currents( Peak and RMS value of Alternating Current/ Voltage: Reactance and Impedance) NEET Questions

Physics - Electromagnetic Induction and Alternating Currents

Alternating Currents( Peak and RMS value of Alternating Current/ Voltage: Reactance and Impedance) MCQ Questions


7.
The RMS value of an AC is also called:
A.
Average value
B.
Instantaneous value
C.
Virtual/effective value
D.
Peak value
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ANSWER :
C. Virtual/effective value
8.
An AC source has peak value 200 V. Its RMS value is:
A.
100 V
B.
200 V
C.
141.4 V
D.
400 V
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ANSWER :
C. 141.4 V
9.
An AC source has RMS voltage 110 V. Its peak value is:
A.
155.6 V
B.
220 V
C.
55 V
D.
110 V
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ANSWER :
A. 155.6 V
10.
The form factor of a sinusoidal AC is defined as:
A.
RMS/Peak
B.
RMS/Average (half cycle)
C.
Peak/RMS
D.
Peak/Average
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ANSWER :
B. RMS/Average (half cycle)
11.
The peak factor (crest factor) of a sinusoidal AC is:
A.
√2
B.
1.11
C.
1
D.
2
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ANSWER :
A. √2
12.
AC instruments (ammeters, voltmeters) measure:
A.
Instantaneous value
B.
RMS value
C.
Peak value
D.
Average value over full cycle
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ANSWER :
B. RMS value