Alternating Current Ques 8
8. Figure shows a circuit that contains three identical resistors with resistance $R=9.0 $ $\Omega$ each, two identical inductors with inductance $L=2.0$ $mH$ each, and an ideal battery with emf $\varepsilon=18$ $ V$. The current ’ $i$ ’ through the battery just after the switch closed is
[2017]
(a) $0.2$ $ A$
(b) $2 $ $A$
(c) $ 0$
(d) $2$ $ mA$
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Answer:
Correct Answer: 8.(b)
Solution:
- (b)
At $t=0$, no current flows through $R_1$ and $R_3$
Current through battery just after the switch closed is
$ i=\frac{\varepsilon}{R_2}=\frac{18}{9}=2$ $ A $
BETA
