Question

An ideal coil of $10H$ is connected in series with a resistance of $5\, \Omega$ and a battery of $5V. 2$ second after the connection is made the current flowing in amperes in the circuit is

• A. $(1 - e)$
• B. $e$
• C. $e^{-1}$
• D. $(1 - e^{-1})$

Answer 1

Answer: (D)

$(1 - e^{-1})$

Answer 2

$i=i_{0}\left(1-e^{\frac{Rt}{L}}\right)$ $=\left(1-e^{-1}\right)$