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In wheat stone bridge, P and Q are approximately equal. When R is 500Ω , the bridge is balanced. On interchanging P and Q, the values of R is 505Ω, for balancing . The value of ‘S’ is

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a

500.5Ω

b

501.5Ω

c

502.5Ω

d

503.5Ω

answer is C.

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In wheat stone bridge, P and Q are approximately equal. When R is 500Ω , the bridge is balanced. On interchanging P and Q, the values of R is 505Ω, for balancing . The value of ‘S’ is