Alternating Current Ques 15
15. 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]
(a) $\pi / 6$
(b) $\pi / 4$
(c) $\pi / 2$
(d) zero
Show Answer
Answer:
Correct Answer: 15.(b)
Solution:
- The phase difference $\phi$ is given by
$ \begin{aligned} & \tan \phi=\frac{X_L}{R} \\ & =\frac{3}{3}=1 \quad \Rightarrow \phi=\frac{\pi}{4} . \end{aligned} $
BETA
