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Resistance of galvanometer is 500Omega. ...

Resistance of galvanometer is `500Omega`. Effective resistance of ammeter with shunt is `25 Omega`. What is the value of shunt ?

A

`(500)/(19)Omega`

B

`(250)/(19)Omega`

C

`(1000)/(19)Omega`

D

`(125)/(19)Omega`

Text Solution

Verified by Experts

The correct Answer is:
A
`G=500Omega , R_A=25 Omega , S=?`
`R_A=(G.S)/(G+S)`
`25=(500S)/(500+S)`
`500 S-25S=25xx500`
`S=(25xx500)/(475)=(25xx20)/(19)=(500)/(19)Omega` .
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