[" 15.OBJECTIVE PHYSICS VOL.2"],[" 15.The force between the plates of a parallel plyto* "4" ."],[" capacitor of capacitance C and distance of separation "],[" of the plates "d" with a potential difference V between "],[" the plates,is "],[[" (a) "(eV^(2))/(2d)," (b) "(C^(2)V^(2))/(2d^(2))],[" (c) "(C^(2)V^(2))/(d^(2))," (d) "(V^(2)d)/(C)]]