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A galvanometer having a coil resistance ...

A galvanometer having a coil resistance `200 Omega` gives a full scale deflection when a current of 1mA is passed through it. What is the value of the resistance which can convert this galvanometer into a voltmeter giving full scale deflection for a potential difference of 50 V?

A

`19.9 k Omega`

B

`48.9 k Omega`

C

`49.8 k Omega`

D

`10 k Omega`

Text Solution

Verified by Experts

The correct Answer is:
C
`i_g = 1 m A, R_g = 200 Omega`
` V = i_(g)R+R_g)`
`50= 1xx10^(-3)(R+200)`
`R= 49.8 k Omega`
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