MHT CET 2024 Physics question

A galvanometer has resistance 80 and it is shunted with resistance 20. If 20% of the main current flows through galvanometer, then what is the value of main current?

(A)0.2 A
(B)0.8 A
(C)1 ACorrect
(D)1.2 A

Answer: (C)

Solution

With a shunt in parallel with the galvanometer , the fraction of the main current through the galvanometer is , i.e. exactly 20%, which agrees with the statement. The numerical value of the main current needs the galvanometer current; taking the

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Question ID VK-098864