#### Question

Each plate of a parallel plate capacitor has a charge q on it. The capacitor is now connected to a batter. Now,

(a) the facing surfaces of the capacitor have equal and opposite charges

(b) the two plates of the capacitor have equal and opposite charges

(c) the battery supplies equal and opposite charges to the two plates

(d) the outer surfaces of the plates have equal charges

#### Solution

(a) the facing surfaces of the capacitor have equal and opposite charges

(b) the two plates of the capacitor have equal and opposite charges

(d) the outer surfaces of the plates have equal charges

In H.C Verma the answer is (a), (c) ,(d). But according to us the answer should be (a), (b), (d) all these options are the properties of a capacitor and the option (c) is incorrect because the battery is a source of energy not charge. Moreover if a capacitor plates have equal charge on outside and equal charge on inside then one can think that the charge on the plates must be also equal so option (b) cant be incorrect.