Physics - Electrostatics Question with Solution | TestHub

The separation between the plates of a parallel plate capacitor, connected to a battery (zero resistance) of constant EMF is increased with constant (very slow) speed by external forces. During the process,$w$is the work done by external forces.$\mathrm{\Delta }U$is the change in potential energy of the capacitor,$w_b$is work done by the battery and$H$is the heat loss in the circuit. Then