MHT CET 2024 Physics question

In an ammeter, 4% of the main current is passing through the galvanometer, If shunt resistance is 5, then resistance of galvanometer will be

(A)60
(B)120Correct
(C)240
(D)480

Answer: (B)

Solution

Let the main current be . The galvanometer carries , so the shunt carries . The galvanometer and the shunt are in parallel, so they have the same potential difference: . Therefore ,

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Question ID VK-094965