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MHT CET202120 Sep 2021Evening ShiftPhysicsCurrent ElectricityActual

A galvanometer of resistance 50 is converted to an ammeter. After shunting, the effective resistance of ammeter is 2.5 . The value of shunt is

Options

  1. A100 19
  2. B50 19
  3. C25 19
  4. D75 19

Correct answer

B. 50 19

Step-by-step solution

The resistance of the galvanometer and the shunt are in parallel. Their equivalent resistance is given by aligned & 1 R = 1 G + 1 ~S & 1 ~S = 1 2.5 - 1 50 = 19 50 aligned Or S = 50 19

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