JEE PYQ: Experimental Physics Question 12
Question 12 - 2020 (05 Sep 2020 Shift 2)
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 $2^\circ$, its figure of merit is close to:
(1) $333^\circ$ A/div.
(2) $6 \times 10^{-3}$ A/div.
(3) $666^\circ$ A/div.
(4) $3 \times 10^{-3}$ A/div.
Show Answer
Answer: (4)
Solution
Figure of merit $= \frac{I}{\theta} = \frac{6 \times 10^{-3}}{2} = 3 \times 10^{-3}$ A/div.
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