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A voltmeter has a resistance G and range...

A voltmeter has a resistance `G` and range `V`. Calculate the resistance to be used in series with it to extend its range to `nV`.

A

nG

B

`(n-1)G`

C

`G//n`

D

`G//(n-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
Suppose resistance R is connected in series with voltmeter as shown
By ohm.s law

`i_(g)=R=(n-1)V`
`R=(n-1)G` [where `i_(g)=(V)/(G)`]
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