Question: What is the final charge on a capacitor (Q) in an RC circuit after a long time if the voltage across it is 5V and the capacitance is 200 microfarads?

Options:

1. 0.001 C
2. 0.01 C
3. 0.0001 C
4. 0.1 C

Correct Answer: 0.001 C

Solution:

The charge Q is given by Q = C * V = 200 x 10^-6 F * 5 V = 0.001 C.