NEET Physics Current Electricity Questions Solved

NEET - 2012

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

(a)0.001                                     (b)0.01

(c)1                                            (d)0.05

The full scale deflection current

      ig=25 mVGampere

where G is the resistance of the meter.

The value of shunt required for converting it into ammeter of range 25A is S=igGi-ig

So that, S=25 mV25=0.001Ω

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