Current Electricity Charging Discharging Of Capacitors Question 201

Question: When a $ 12,\Omega $ resistor is connected with a moving coil galvanometer then its deflection reduces from 50 divisions to 10 divisions. The resistance of the galvanometer is

[CPMT 2002; DPMT 2003]

Options:

A) $ 24,\Omega $

B) $ 36,\Omega $

C) $ 48,\Omega $

D) $ 60,\Omega $

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Answer:

Correct Answer: C

Solution:

$ i _{g}=\frac{iS}{S+G} $

Therefore $ 10=\frac{50\times 12}{12+G} $

Therefore $ 12+G=60 $

Therefore $ G=48\Omega $