JEE Main 2022 Physics question

A teacher in his physics laboratory allotted an experiment to determine the resistance (G) of a galvanometer. Students took the observations for 1/3 deflection in the galvanometer. Which of the below is true for measuring value of G ?

(1)1/3 deflection method cannot be used for determining the resistance of the galvanometer.
(2)1/3 deflection method can be used and in this case the G equals to twice the value of shunt resistance (s)Correct
(3)1/3 deflection method can be used and in this case, the G equals to three times the value of shunt resistance (s)
(4)1/3 deflection method can be used and in this case the G value equals to the shunt resistance(s)

Answer: (2)

Solution

With the shunt S in parallel with the galvanometer G, the galvanometer carries i/3

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Question ID VK-024943