Find the potential difference across point a and b in figure.
(ε1+ε2c1+C2)C1
(ε1+ε22c1+C2)C1
(ε1+ε23c1+C2)C1
(ε1+ε24c1+C2)C1
A
(ε1+ε23c1+C2)C1
B
(ε1+ε2c1+C2)C1
C
(ε1+ε22c1+C2)C1
D
(ε1+ε24c1+C2)C1
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Solution
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The correct option is A(ε1+ε2c1+C2)C1
V1=QC1,V2=QC2
−ε1+V1−ε2+V2=0
(ε1+ε2)=V1+V2
ε1+ε2=QC1+QC2
Q=(ε1+ε2)(C1C2C1+C2)
V2=QC2
V2=(ε1+ε2)(C1C1+C2)
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