To enhance the sensitivity, an Ammeter is to be designed with two kinds of graduation on its scale — 0 to `10 A` and 0 to 1 A. for that a galvanometer of resistance `50 Omega` and full scale deflection current 1 mA was used along with two resistances `R_(1) and R_(2)` as shown. Either of `T_(1) or T_(2)` is to be used as negative terminal of the Ammeter. (a) When measuring a current of the order of `0.1 A`, which shall be used as negative terminal — `T_(1) or T_(2)` ? (b) find the values of `R_(1) and R_(2)`.

To enhance the sensitivity, an Ammeter is to be designed with two kind

1.	To enhance the sensitivity, an Ammeter is to be designed with two kinds of graduation on its scale — 0 to `10 A` and 0 to 1 A. for that a galvanometer of resistance `50 Omega` and full scale deflection current 1 mA was used along with two resistances `R_(1) and R_(2)` as shown. Either of `T_(1) or T_(2)` is to be used as negative terminal of the Ammeter. (a) When measuring a current of the order of `0.1 A`, which shall be used as negative terminal — `T_(1) or T_(2)` ? (b) find the values of `R_(1) and R_(2)`.
Answer» Correct Answer - (a) `T_(2)` (b) `R_(1)=(5)/(999)Omega` `R_(2)=(5)/(111)Omega`

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