STANDARDPhysics-Alternating Current
STANDARD Physics AC Voltage MCQ Question
Type: MCQ-conceptual-Medium-Class 12
The relation between an ac voltage source and time in SI units is V = 120 sin(100 πt) cos(100 πt) V. The value of peak voltage and frequency will be respectively
A
120 V and 100 Hz
B
120/√2 V and 100 Hz
C
60 V and 200 Hz
D
60 V and 100 Hz
Correct Answer
Option D
Detailed Explanation
Using the identity sin(2θ) = 2sinθcosθ, the equation becomes V = 60 sin(200 πt) V, indicating a peak voltage of 60 V and frequency of 100 Hz.
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