MHT CET 2022 Physics question
A galvanometer of resistance 'G' is shunted by a resistance of 5 . To keep the main current in the circuit unchanged, the resistance to be put in series with the same galvanometer is
Answer: (A)
Solution
Before shunting, the galvanometer offers resistance to the circuit. With a shunt (=5 ) in parallel, the combination has resistance , which is less than , so the main current would increase. To restore the original main current, a series
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