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A galvanometer of resistance 10ohms changes its range from 1mA to 101 mA when a resistive wire is connected in parallel.If the resistivity of the material of the wire and its area of cross section are 10^-6 ohm m and 1mm^2,then the length of the wire is

A galvanometer of resistance 10ohms changes its range from 1mA to 101 mA when a resistive wire is connected in parallel.If the resistivity of the material of the wire and its area of cross section are 10^-6 ohm m and 1mm^2,then the length of the wire is

Grade:12th pass

1 Answers

Saurabh Koranglekar
askIITians Faculty 10335 Points
3 years ago
Dear student

R=rho*l/A;

i ( in lower resister) = i( total) * (R larger)/(R-large + R-lower)

Regards

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