Alternating Current - Result Question 20
20. An ac voltage is applied to a resistance $R$ and an inductor $L$ in series. If $R$ and the inductive reactance are both equal to $3 \Omega$, the phase difference between the applied voltage and the current in the circuit is
[2011]
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Answer:
Correct Answer: 20. (b)
Solution:
$ \begin{aligned} & \tan \phi=\frac{X_L}{R} \\ & =\frac{3}{3}=1 \quad \Rightarrow \phi=\frac{\pi}{4} . \end{aligned} $
