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  • A voltmeter has a resistance of G ohm and range V volt. The value of resistance used in series to convert it into voltmeter of range n V volt is  Opt

A voltmeter has a resistance of G ohm and range V volt. The value of resistance used in series to convert it into voltmeter of range n V volt is
 

Option: 1

\mathrm{ n G}


Option: 2

\mathrm{(n-1) G}


Option: 3

\mathrm{\frac{G}{n}}


Option: 4

\mathrm{ \frac{G}{(n-1)}}


Answers (1)

best_answer

We know that \mathrm{R=\frac{V}{I_{\mathrm{g}}}-G}
The voltmeter give the full-scale deflection for potential difference V. Its resistance is G.
Hence, \mathrm{ I_{\mathrm{g}}=\left (\frac{V}{G} \right ).}
Given that \mathrm{V=n V}


 

Posted by

Devendra Khairwa

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