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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 :Q1+Q2C|Q2C||Q3C|1C[(Q1+Q2)−(Q3−Q4)]

A
|Q2C|
B
1C[(Q1+Q2)(Q3Q4)]
C
Q1+Q2C
D
|Q3C|
Solution
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#### For parallel plate capacitor, Q2 andQ3 must be same and equal in magnitude.i.e,|Q2|=|Q3|So, potential difference between the plates, V=|Q2|C=|Q3|CAns: (B),(C)

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