In a metre-bridge experiment, the positions of the cell E and galvanometer G are interchanged (see figure). What is observed in the galvanometer as the jockey position is varied? Image
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In a metre-bridge experiment, the positions of the cell E and galvanometer G are interchanged (see figure). What is observed in the galvanometer as the jockey position is varied? Image

G1 Physics · Accepted Answer

Step 1: A metre bridge is a Wheatstone bridge, whose balance condition is a ratio of the four arm resistances. Step 2: Interchanging the positions of battery and galvanometer does not change the Wheatstone-bridge balance point (reciprocity property). Step 3: At balance there is no potential difference across the galvanometer, so it reads zero. Step 4: On either side of balance the polarity of galvanometer current can reverse, giving left or right deflection. Final answer: Both directional defle…