Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityElectrical instrumentEasy2 minPYQ_2018

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Current sensitivity of a moving coil galvanometer is $5 d i v / m A$ and its voltage sensitivity (angular deflection per unit voltage applied) is $20 d i v / V$ . The resistance of the galvanometer isNEET 2018

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Solution:

$\frac{θ}{i} = \frac{50}{10^{- 3}} = 5000, \frac{θ}{V} = 20$

$\Rightarrow \frac{θ / i}{θ / V} = \frac{5000}{10} = 250 \Rightarrow \frac{V}{i} = R = 250 Ω$

$(∵ Voltage sensitivity = \frac{current sensitivity}{Resistance})$

Stream:NEETSubject:PhysicsTopic:Current ElectricitySubtopic:Electrical instrument

⏱ 2mℹ️ Source: PYQ_2018

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