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A galavanometer, whose resistance is 50 ...

A galavanometer, whose resistance is 50 ohm has 25 divisions in it. When a current of `4xx10^(-4)` A passes through it,its needle (pointer) deflects by one division. To use this galvanometer as a volmeter of range `2.5V`, it is should be connected to a resistance of :

Text Solution

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Galvanometer has 25 divisions
`I_(g)=4xx10^(-4)xx25=10^(-2)A`

`v=I_(g)(G+R)`
`2.5=(50+R)10^(-2):.R=200Omega`
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