A galvenometer has a resistance of `50 Omega` and its full-scale deflection current is `50 mu A`. What resistance should be added to it so that it can have a range of `0-5 V`?
Text Solution
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Given `I_(G) = 50 muA`. Maximum voltage to be measured is `V = 5 V`. The galvanometer resistance `G = 50 Omega`. Now , `R = (V)/(I_(G)) - G = (5)/(50 xx 10^(-6)) - 50 = 100 K Omega`
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