Physics - Electrostatics Question with Solution | TestHub

Three identical metal plates of area$\mathrm{\prime }\mathrm{A}\mathrm{\prime }$are at distance${\mathrm{d}}_{1\mathrm{ }}$&${\mathrm{d}}_2$from each other. Metal plate$\mathrm{A}$is uncharged, while plate$\mathrm{B}$&$\mathrm{C}$have respective charges$+\mathrm{q}$&$-\mathrm{q}.$If metal plates$\mathrm{A}$&$\mathrm{C}$are connected by switch$\mathrm{K}$through a consumer of unknown resistance, what energy does the consumer give out to its surrounding?
Assume${\mathrm{d}}_1={\mathrm{d}}_2=\mathrm{d}$