An AC voltage source has an output of ${\rm{\Delta }}V = \left( {200{\rm{V}}} \right)\sin 2\pi ft.$ , This source is connected to a 100 Ω resistor. RMS current in the resistance is

NEET UG PHYSICS MCQ: ALTERNATING CURRENT

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An AC voltage source has an output of

\mathrm{\Delta }V = \left( {200\mathrm{V}} \right)\sin 2\pi ft.

, This source is connected to a 100 Ω resistor. RMS current in the resistance is

View answer and explanation

Correct option: A

1.41A

Option A (1.41A) is correct because the RMS voltage is

V_{rms} = \frac{200}{\sqrt{2}}

and the RMS current is

I_{rms} = \frac{V_{rms}}{R} = \frac{200}{\sqrt{2} \cdot 100} = \sqrt{2} \approx 1.41

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\mathrm{AC}

V_C=I X_C

V=I Z

X_C

Z

V = 240\sin 120\;t

{X_L}

R