A voltmeter has a resistance of G Ohm and range of V volt. The value of resistance used in series to convert it into a voltmeter of range nV volt is
(a) nG
(b) \(\frac{G}{(n-1)}\)
(c) (n – 1)G
(d) \(\frac{G}{n}\)
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A voltmeter has a resistance of G Ohm and range of V volt. The value of resistance used in series to convert it into a voltmeter of range nV volt is
(a) nG
(b) \(\frac{G}{(n-1)}\)
(c) (n – 1)G
(d) \(\frac{G}{n}\)
A voltmeter has a resistance of G Ohm and range of V volt. The value of resistance used in series to convert it into a voltmeter of range nV volt is
(a) nG
(b) \(\frac{G}{(n-1)}\)
(c) (n – 1)G
(d) \(\frac{G}{n}\)
Answer is : (c) (n – 1)G
\(I_g=\frac{V}{G}\) and \(R=\frac{nV}{I_g}-G\) \(=\frac{nV}{V/G}-G\)
= (n – 1)G