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MHT CET 2021 (22 Sep, Shift 1) · RL and RC Series Circuits

RL and RC Series Circuits question from MHT CET 2021 (22 Sep, Shift 1)

Q38MHT CET 2021 · 22 SEP · SHIFT 1Easy

RL and RC Series Circuits

In an a.c. circuit, a resistance R = 40 $\Omega$ and an inductance 'L' are connected in series. If the phase angle between voltage and current is 45 ${}^\circ$ , then the value of the inductive reactance is (tan 45 ${}^\circ$ = 1)

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Answer: (b)

For series LR, $\tan\phi = \frac{X_L}{R}$ .
$\tan 45^\circ = 1 \Rightarrow X_L = R = 40\ \Omega$
So the answer is (b) $40\ \Omega$ .

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