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A part of a circuit is shown in figure. ...

A part of a circuit is shown in figure. Here reading of ammeter is `5A` and voltmeter is `100 V`. If voltmeter resistance is `2500 ohm`, then the resistance `R` is approximately

A

`20 Omega`

B

`10 Omega`

C

`100 Omega`

D

`200 Omega`

Text Solution

Verified by Experts

The correct Answer is:
A
`100=(5)[((2500R))/(2500+R)]`
solving this equation we get
`R=20Omega`
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