Q.

The metre bridge shown is in balance position with PQ=l1l2 . If we now interchange the positions of galvanometer and cell, willthe bridge work? If yes, what will be balance condition?

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a

yes, PQ¯=I1I2

b

yes, P 2−I1Q¯2¯+I1

c

no,no null point

d

yes, PQ=I2Γ1

answer is A.

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Detailed Solution

In balanced bridge (initially)PQ=1l2 In balanced bridge (finally) Pl1=Ql2PQ=l1l2 On interchanging galvanometer and battery positions, the balance condition remains unchanged.
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