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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`.

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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`.
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Correct Answer - A::B::C::D
`V=i_gG`
`:. i_g=V/G`
Now, `nV=i_g(G+R)=V/G(G+R)`
`:. R=(n-1)G`
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