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AP EAMCET201726 Apr 2017Evening ShiftPhysicsCurrent ElectricityActual

A galvanometer of resistance 10 changes its range from 1 ~mA 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 1 10⁻⁶ m and 1 ~mm ^2 respectively, then the length of the wire is

Options

  1. A10 cm
  2. B1 cm
  3. C20 cm
  4. D15 cm

Correct answer

A. 10 cm

Step-by-step solution

No solution. Refer to answer key.

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