A moving coil galvanometer allows a full scale current of 10–4A. A series resistance of 2KΩ is required to convert the above galvanometer into a voltmeter of range 0-5 V. Therefore the value of shunt resistance required to convert the above galvanometer into an ammeter of range 0-10 mA is :

Engineering

Physics

Galvanometer Ammeter and Voltmeter

Question

A moving coil galvanometer allows a full scale current of 10^–4A. A series resistance of 2KΩ is required to convert the above galvanometer into a voltmeter of range 0-5 V. Therefore the value of shunt resistance required to convert the above galvanometer into an ammeter of range 0-10 mA is :

500Ω

200Ω

480Ω

100Ω

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0.2 + 10^–4 G = 5

G = 4.8 x 10⁴ $Ω$

S x 10^-2 = G x 10^-4

S = 480