Question

While discharging, what happens to the current in the capacitive circuit?

(a) Decreases linearly

(b) Increases linearly

(c) Decreases exponentially

(d) Increases exponentially

This question was addressed to me in an interview.

Question is from Growth and Decay in section Capacitance and Capacitors of Basic Electrical Engineering

Answer 1

The correct answer is (d) Increases exponentially

Best explanation: The equation for the value of current in a discharging capacitive circuit is:

I=I0(1-e^-t/RC). From this equation, we can see that the current is exponentially increasing.