two capacitors A and B having capacitance of 20mf and 30mf respectively are connected in series to a 600v to supply.
1 Determine the p.d across each capacitor?​
2 if a third capacitor C is connected in parallel with A and B it is then found that the p.d across B is 400v,
calculate the value of C and the energy stored in it.

Respuesta :

From the calculations, the Pd across the capacitors are 360V and 240V respectively.

What is the capacitor?

The capacitor is a device used to store charges. Since the charge for capacitors in series is the same;

1/C = 1/20 + 1/30 = 0.05 + 0.033

C = 12 * 10^-3 F

Q = 12 * 10^-3 F * 600 V

Q = 7.2  C

Voltage across the 20mf  capacitor = 7.2  C/20 * 10^-3

= 360 V

Voltage across the 30mf capacitor =  7.2  C/30 * 10^-3

=240 V

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