Q.

In the given circuit if point C is connected to the earth and a potential of +2000V is given to the point A, the potential at B is 

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a

1000 V

b

500 V

c

1500 V

d

400 V

answer is C.

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Detailed Solution

The given circuit can be redrawn as follows

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({V_A} - {V_B}) = \left( {\frac{{15}}{{5 + 15}}} \right) \times 2000 \Rightarrow {V_A} - {V_B} = 1500\,V

\Rightarrow 2000 - {V_B} = 1500V \Rightarrow {V_B} = 500V

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