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Q.

In the meter bridge shown in the figure, when deflection in the galvanometer is zero, length AN = 40 cm. When P and Q are interchanged, what will be the shift of null point?

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Detailed Solution

Initially, PQ=40100−40=23Finally, x100−x=QP=32⇒x=60 cm∴ Shift=(60−40) cm=20 cm

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