Question

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

(a) Decreases linearly

(b) Increases linearly

(c) Decreases exponentially

(d) Increases exponentially

This question was posed to me in quiz.

The above asked question is from Growth and Decay topic in section Capacitance and Capacitors of Basic Electrical Engineering

Answer 1

Right choice is (c) Decreases exponentially

To explain I would say: The equation for the value of current in a charging capacitive circuit is:

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