Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismMiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

Sensitivity of moving coil galvanometer is $s$ . If a shunt of ${(\frac{1}{8})}^{t h}$ of the resistance of galvanometer is connected to moving coil galvanometer, its sensitivity becomes

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Answer:

Solution:

$S = \frac{G}{8}, S = \frac{G}{n - 1}$

$\frac{G}{8} = \frac{G}{n - 1}$

$∴ 8 = n - 1$

$∴ n = 8 + 1 = 9$

Since range of galvanometer has increased nine times its sensitivity reduces to $\frac{1}{9}$ .

$∴ S' = \frac{s}{9}$

Stream:JEESubject:PhysicsTopic:MagnetismSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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