Answer to Question #276242 in Other for Paul

Question

If the energy stored in a 1/8 F capacitor is 25 J, find the voltage and charge.

Answer 1

energy:

$E=CU^2/2$

voltage:

$U=\sqrt{2E/C}=\sqrt{2\cdot25\cdot8}=20$ V

charge:

$q=CU=20/8=2.5$ C