[" 118) OBJECTIVE PHYSICS VOL."2],[" ((15.) The force between the plates of a parallel plate "],[" capacitor of capacitance "C" and diftance of separation "],[" of the plates "d" with a potential difference "V" between "],[" the plates,is "],[[" (a) "(CV^(2))/(2d)," (b) "(C^(2)V^(2))/(2d^(2))],[" (c) "(C^(2)V^(2))/(d^(2))," (d) "(V^(2)d)/(C)," 23"]]