Q.

Resistances P, Q, R, S of values 2, 3, 2, 4 . To form a wheat stone bridge the resistance to be connected to S to have the bridge balanced is

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a

12 Ω parallel

b

1Ωseries

c

2Ω series

d

10Ω parallel

answer is C.

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Detailed Solution

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PQ=RS23=24+x
’x ’ should be parallel 3<4Ω
4×x4+x=3 solve x=12Ω

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Resistances P, Q, R, S of values 2, 3, 2, 4 . To form a wheat stone bridge the resistance to be connected to S to have the bridge balanced is