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


13.
An alternating current is represented by i = 4 sin(100πt) A. The RMS value of current is:
A.
2√2 A
B.
4 A
C.
2 A
D.
4/√2 A
😑 View Answer Rough Work Error
ANSWER :
A. 2√2 A
14.
An AC is given by i = 10 sin(314t) A. Its frequency is:
A.
314 Hz
B.
628 Hz
C.
100 Hz
D.
50 Hz
😑 View Answer Rough Work Error
ANSWER :
D. 50 Hz
15.
The peak value of voltage in an AC circuit is 200√2 V. The RMS value is:
A.
100√2 V
B.
100 V
C.
400 V
D.
200 V
😑 View Answer Rough Work Error
ANSWER :
D. 200 V
16.
An AC source is described by V = 220√2 sin(314t) V. Its RMS voltage is:
A.
311 V
B.
220 V
C.
220√2 V
D.
110 V
😑 View Answer Rough Work Error
ANSWER :
B. 220 V
17.
Power dissipated in an AC circuit involves which value of current?
A.
Peak
B.
Instantaneous
C.
Average over full cycle
D.
RMS
😑 View Answer Rough Work Error
ANSWER :
D. RMS
18.
The RMS value of an AC voltage V = 100 sin(ωt) + 100 cos(ωt) is:
A.
100/√2 V
B.
200 V
C.
100 V
D.
141.4 V
😑 View Answer Rough Work Error
ANSWER :
C. 100 V