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Question

In the figure a potential of 1200V is given to point A and point B is earthed, what is the potential at the point P?


A

100V

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B

200V

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C

400V

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D

800V

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Solution

The correct option is

C

400V



3μF and 6μF are connected in series
q3=q6
C1V1=C2V2
3(1200VP)=6(VPVB)
VB=0 [Grounded]
1200VP=2VP
3VP=1200
VP=400V


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