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Questions  

In the circuit of fig. capacitors A and B have identical geometry, but a material of dielectric constant 3 is present between the plates of B. The potential difference across A and B are, respectively



 

a
2.5 V, 7.5 V
b
7.5 V,2.5 V
c
2 V, 8 V
d
8 V, 2 V

detailed solution

Correct option is B

The capacitance of capacitor B will be 3 times the capacitance of capacitor A. Hence the potential of B will be one-third as compared to A.Therefore VA+VA3=10 ⇒VA=7.5 volt and VB=2.5 volt

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