JEE PYQ: Alternating Current Question 13
Question 13 - 2021 (25 Feb Shift 1)
The current (i) at time $t = 0$ and $t = \infty$ respectively for the given circuit is:
(a) $\frac{18E}{55}, \frac{5E}{18}$ (b) $\frac{5E}{18}, \frac{18E}{55}$ (c) $\frac{5E}{18}, \frac{10E}{33}$ (d) $\frac{10E}{33}, \frac{5E}{18}$
Show Answer
Answer: (c)
Solution
At $t=0$, inductor is open circuit. $R_{eq} = \frac{54}{15}$, $I(t=0) = \frac{5E}{18}$. At $t=\infty$, inductor is wire. $R_{eq} = \frac{33}{10}$, $I = \frac{10E}{33}$.
BETA
