Question

Calculate the total charge on a 25µF capacitor connected to a constant voltage of 100V in a d.c. circuit. How much energy is stored in the capacitor?

Answer 1

In order to calculate the charge storaged on the capacitor, use the following formula:

C = Q/V

where,

C: capacitance = 25µF = 25*10^-6F

Q: charge = ?

V: voltage = 100V

Solve the equation above for Q, replace the values of the other parameters and simplify:

$Q=CV=(25\cdot10^{-6}F)(100V)=0.0025C_{}$

Hence, the total charge on the capacitor is 0.0025C