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NEET2012PhysicsCurrent ElectricityActual

A millivoltmeter of 25 mV range is to be converted into an ammeter of 25 A range. The value (in ohm) of necessary shunt will be

Options

  1. A0.001
  2. B0.01
  3. C1
  4. D0.05

Correct answer

A. 0.001

Step-by-step solution

The full scale deflection current i_g= 25 mV G ampere where G is the resistance of the meter. The value of shunt required for converting it into ammeter of range 25 ~A is S= i_g G i-i_g So that, S 25 mV 25 =0.001

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