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Solution


Q.

The number of turns of the coil of a moving coil galvanometer is increased in order to increase current sensitivity by 50%. The percentage change in voltage sensitivity of the galvanometer will be            [2023]
1 100%  
2 50%  
3 75%  
4 0%  

Ans.

(4)

Current sensitivity=Voltage sensitivity×R

Current sensitivity is made 1.5 times.

R also increases 1.5 times.

Hence voltage sensitivity=1.5×current sensitivity1.5×R=no change