Question

In the circuit given below, the switch is closed at t = 0. At t = 0^+ the current through C is ___________

(a) 2 A

(b) 3 A

(c) 4 A

(d) 5 A

I had been asked this question in my homework.

I would like to ask this question from Calculation of I(0+), di/dt(0+), d2I/dt2(0+) in Circuits Involving both Capacitor and Inductor topic in division Application of the Laplace Transform in Circuit Analysis of Network Theory

Answer 1

The correct answer is (d) 5 A

Explanation: We know that,

When the capacitor is fully charged, it acts as a short circuit.

The equivalent resistance Req = (10 + 10) Ω

= 20 Ω

Given voltage = 100 V

So, current through C = \(\frac{100}{20}\) A = 5 A.