Question

what capacitance is required to store an energy of 10kw.h at a potential difference of 1000v?​

Answer 1

10 KWh = 10000 x 3600 = 36000000 Joules
Energy stored = 1/2 C V^2
36 000 000 = 1/2 C x 1 000 000
C = 72 Farad ( this is a huge value !!)