When shunt of 4 Ω is attached to a galvanometer, the deflection in the galvanometer is reduced to 1 5 th . If an additional shunt of 2 Ω is also connected. The deflection of galvanometer will be reduced to

Intial condition When shunt of 4 Ω is used, i 5 × G = 4 5 i × 4 ⇒ G = 16 Ω When additional shunt of 2 Ω is attached, i ' × 16 = i − i ' 4 3 12 i ' = i − i ' ⇒ i ' = 1 13 It will reduce to 1 13 of the initial value.

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PhysicsCurrent ElectricityElectrical instrumentEasy2 minPYQ_2020

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When shunt of $4 Ω$ is attached to a galvanometer, the deflection in the galvanometer is reduced to $\frac{1}{5} th$ . If an additional shunt of $2 Ω$ is also connected. The deflection of galvanometer will be reduced to

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Answer:

Solution:

Intial condition

When shunt of $4 Ω$ is used, $\frac{i}{5} \times G = \frac{4}{5} i \times 4$

$\Rightarrow G = 16 Ω$

When additional shunt of $2 Ω$ is attached,

$i^{'} \times 16 = (i - i^{'}) \frac{4}{3}$

$12 i^{'} = i - i^{'}$

$\Rightarrow i' = \frac{1}{13}$

It will reduce to $\frac{1}{13}$ of the initial value.

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Current ElectricitySubtopic:Electrical instrument

⏱ 2mℹ️ Source: PYQ_2020

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