A galvanometer has a 50 division scale. Battery has no internal resistance. It is found that there is deflection of 40 divisions when R = 2400 $\Omega $. Deflection becomes 20 divisions when resistance taken from resistance box is 4900 $\Omega $. Then we can conclude :

Question

Resistance of galvanometer is 200 $\Omega $

Full scale deflection current is 2 mA.

Current sensitivity of galvanometer is 20 $\mu $A/division.

Resistance required on R.B. for a deflection of 10 divisions is 9800 $\Omega $.

Solution

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