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Question:

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 Ω. Deflection becomes 20 divisions when resistance taken from resistance box is 4900 Ω. Then we can conclude:

current sensitivity of galvanometer is 20µA/division

resistance required on R.B. for a deflection of 10 divisions is 9800 Ω.

Not Solvable

resistance of galvanometer is 200 Ω

full scale deflection current is 2 m.A.

Solution:

This question is not solvable.