The value of the current i(t) in amperes in the above circuit is

Question

Question

This question was previously asked in

ESE Electronics 2010 Paper 1: Official Paper

Attempt in App

Answer 1

Since at t = 0, the switch is closed.

So at t > 0, the circuit will be.

Redrawing above circuit in s-domain –

i(t) = 10 u(t) Amp

NOTE:

Since the switch is closed t ≥ 0

So 10 V will work only after t ≥ 0 that’s why we take voltage source as 10 u(t). In Laplace or s-domain