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


1.
The RMS value of an alternating current of peak value I₀ is:
A.
√2·I₀
B.
I₀/2
C.
I₀/√2
D.
I₀
😑 View Answer Rough Work Error
ANSWER :
C. I₀/√2
2.
The relation between peak voltage V₀ and RMS voltage V_rms for a sinusoidal AC is:
A.
V_rms = V₀/2
B.
V_rms = V₀/√2
C.
V_rms = V₀
D.
V_rms = √2·V₀
😑 View Answer Rough Work Error
ANSWER :
B. V_rms = V₀/√2
3.
If the domestic AC supply has V_rms = 220 V, the peak voltage is approximately:
A.
220 V
B.
156 V
C.
311 V
D.
440 V
😑 View Answer Rough Work Error
ANSWER :
C. 311 V
4.
The average value of an alternating current over one complete cycle is:
A.
Zero
B.
I₀/2
C.
I₀/√2
D.
I₀
😑 View Answer Rough Work Error
ANSWER :
A. Zero
5.
The average value of current over HALF cycle (positive half) of a sinusoidal AC is:
A.
π·I₀/2
B.
I₀/√2
C.
2I₀/π
D.
I₀/2
😑 View Answer Rough Work Error
ANSWER :
C. 2I₀/π
6.
The RMS value of an AC is always ____ the peak value.
A.
Less than
B.
Greater than
C.
Independent of
D.
Equal to
😑 View Answer Rough Work Error
ANSWER :
A. Less than