2026 Current ElectricityMeter bridge / Wheatstone bridge - effect of interchanging cell and galvanometer Medium Question 3 of 130 in Current Electricity

In a metre bridge experiment (see figure), the positions of the cell, E, and galvanometer, G, are interchanged. We shall observe in the galvanometer:

A Only the right-sided deflection
B Only the left-sided deflection
C There will be no deflection irrespective of the position of the jockey
D Both right-sided and left-sided deflection and at balance point, no deflection

The answer is D.

Solution

In the given circuit, it is not mentioned whether the metre bridge is balanced or not. So on interchanging the positions of the battery and galvanometer, the deflection may or may not be zero. In the unbalanced condition, the deflection may be left or right sided depending on the jockey position, and at the balance point there is no deflection.

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130 questions from this chapter have appeared across 27 exam years.