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The resistance of a galvanometer is 10 O...

The resistance of a galvanometer is `10 Omega`. It gives full-scale deflections when `1 mA` current is passed. The resistance connected in series for converting it into a voltmeter of `2.5 V` will be

A

`24.9 Omega`

B

`249 Omega`

C

`2490 Omega`

D

`24900 Omega`

Text Solution

Verified by Experts

The correct Answer is:
C
`i_(g) = (V)/(G + R)` or `10^(-3) = (2.5)/(10 + R)` or `R = 2490 Omega`
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