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A 0-25 m A ammeter having resistance 10 ...

A 0-25 m A ammeter having resistance `10 Omega` is to be converted into voltmeter with a range 0-25 V. A resistance connected in series is

A

`900Omega`

B

`990Omega`

C

`1000Omega`

D

`1100Omega`

Text Solution

Verified by Experts

The correct Answer is:
B
`I_g=25 m A, G=10 Omega , V=25V,R=?`
`R=(V)/(I_g)-G`
`=(25)/(25xx10^-3)-10=1000-10=990Omega`.
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