Physics-AC Voltage

NEET Physics AC Voltage MCQ Question

Type: MCQ-numerical-Hard-Class 12

In an AC circuit with a resistor (R) and an inductor (L), the peak voltage across the resistor is 120 V and the peak voltage across the inductor is 90 V. What is the phase angle ϕ\phi between the total voltage and the current?

A

36.87°

B

53.13°

C

45.00°

D

30.00°

Correct Answer

Option A

Detailed Explanation

Using tanϕ=VLVR=90120\tan \phi = \frac{V_L}{V_R} = \frac{90}{120}, we find ϕ=arctan(0.75)36.87°\phi = \arctan(0.75) \approx 36.87°.

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