physics 2 capacitor

Question

The capacitance of a capacitor 20 mF. What is the charge on each plate of the capacitor when the capacitor is charged to a potential difference of

(a) 6.0 V and

(b) 9.0V

Answer 1

For 6.0V:

C=q/V

So q=CV

q= 20x10^-3.6

q=120x10^-3

q=120 mC

same way for 9.0V:

q=180 mC