CapacitanceHard

Question

In an isolated parallel plate capacitor of capacitance C the four surfaces have charges Q1,Q2,Q3 and Q4 as shown in the figure. The potential difference between the plates is : 
                                           

Options

A.
B.
C.
D.[(Q1 + Q2) − (Q3 − Q4)]

Solution


Charge on outer surfaces are equal so Q1 = Q3 + Q2 + Q4 and Q1 + Q2 + Q3 = Q4
V =   or  V=
Adding (i) and (ii)
Q1 = Q4     and     Q2 = − Q3

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