STANDARDPhysics-Alternating Current
STANDARD Physics RMS Values MCQ Question
Type: MCQ-numerical-Medium-Class 12
If V = 100 sin(100t) V and I = 100 sin(100t + π/3) mA are the instantaneous values of voltage and current, then the rms values of voltage and current are respectively
A
70.7 V, 70.7 mA
B
70.7 V, 70.7 A
C
141.4 V, 141.4 mA
D
100 V, 100 mA
Correct Answer
Option A
Detailed Explanation
The rms value of voltage is calculated as V₀/√2 = 100/√2 = 70.7 V. Similarly, the rms value of current is I₀/√2 = 100/√2 = 70.7 mA.
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