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Q.

In the Whetstone’s bridge (shown in figure) X=Yand A>B. The direction of the current between ab will be

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a

From a to b through c

b

From b to a

c

From a to b

d

From b to a through c

answer is B.

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Detailed Solution

In the part c b d,

Vc−Vb=Vb−Vd    ⇒Vb=Vc−Vd2

In the part c a d

Vc−Va>Va−Vd    ⇒Vc−Vd2>Va  ⇒Vb>Va

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In the Whetstone’s bridge (shown in figure) X=Yand A>B. The direction of the current between ab will be