JEE MAIN - Physics (2020 - 5th September Evening Slot - No. 5)
A galvanometer is used in laboratory for
detecting the null point in electrical
experiments. If, on passing a current of 6 mA it
produces a deflection of 2o, its figure of merit
is close to :
6 $$ \times $$ 10ā3 A/div
666o A/div
3 $$ \times $$ 10ā3 A/div
333o A/div
Explanation
figure of merit = $${I \over \theta }$$
= $${{6 \times {{10}^{ - 3}}} \over 2}$$
= 3 $$ \times $$ 10ā3 A/div
= $${{6 \times {{10}^{ - 3}}} \over 2}$$
= 3 $$ \times $$ 10ā3 A/div
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