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  • An galvanometer is used in the laboratory for detecting the null point in the electrical experiments. If on passing a current of 5 mA it produces a deflection of 2o, its figure of merit is close to:- Option: 1

An galvanometer is used in the laboratory for detecting the null point in the electrical experiments. If on passing a current of 5 mA it produces a deflection of 2o, its figure of merit is close to:-
Option: 1 6\times 10^{-3} A/div
Option: 2 333\degree A/div
Option: 3 3\times 10^{-3} A/div
Option: 4 666\degree A/div

Answers (1)

best_answer

Correct Answer: c) 3\times 10^{-3} A/div

\begin{array}{l} \text { figure of merit} \\ \qquad \begin{aligned} G &=\frac{K}{N B A}=\frac{I}{\theta} \\ \Rightarrow G &=\frac{6 \times 10^{-3}}{2}= 3 \times 10^{-3} \mathrm{Am}^{2} \end{aligned} \end{array}

or,

3 \times 10^{-3} \mathrm{A/div}

Posted by

Deependra Verma

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