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CBSE Class 12-science Answered

State two reasons why a galvanometer can not be used as such to measure current in a given circuit.
Asked by Topperlearning User | 20 May, 2015, 03:05: PM
answered-by-expert Expert Answer

A galvanometer can be used as such to measure current due to following two reasons.

(i) A galvanometer has a finite large resistance and is connected in series in the circuit, so it will increase the resistance of circuit and hence change the value of current in the circuit.

(ii) A galvanometer is a very sensitive device, it gives a full scale deflection for the current of the order of microampere, hence if connected as such it will not measure current of the order of ampere.

Answered by | 20 May, 2015, 05:05: PM
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