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A voltmeter has resistance of 2000 ohms ...

A voltmeter has resistance of 2000 ohms and it can measure upto `2 V`. If we want ot increase its range to `10 V` then the, required resistance in series will be

A

`4000 omega`

B

`6000 omega`

C

`7000 omega`

D

`8000 omega`

Text Solution

Verified by Experts

The correct Answer is:
D
As current `i_(g)=(2)/(2000)=1/1000A`
Now for range `V=8V+2V=10V`
`therefore` Resistance `R=(V)/(i_(g))-G`
`=(10)/(1/1000)-2000=8000 omega`
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