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PhysicsCurrent ElectricityElectrical instrumentEasy2 minPYQ_2012

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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 beNEET 2012 (Screening)

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Solution:

The full scale deflection current $i_{g} = \frac{25 mV}{G} ampere$ where $G$ is the resistance of the meter. The value of shunt required for converting it into ammeter of range $25 A$ is $S = \frac{i _{g} G}{i - i _{g}}$ So that, $S \approx \frac{25 mV}{25} = 0.001Ω$

Stream:NEETSubject:PhysicsTopic:Current ElectricitySubtopic:Electrical instrument

⏱ 2mℹ️ Source: PYQ_2012

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