A voltmeter has resistance of G ohm and range of V volt.The... | Physics | SolveeIt | Solveeit

Today, August 23

Question

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

A

$(n - 1) G$

B

$nG$

C

$\frac{G}{n}$

D

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

Answer

$(n - 1) G$

Explanation

Solution

Resistance required in series is
$R = \frac{V}{I_g} - G = \frac{nV}{\bigg(\frac{V}{G} \bigg)} - G = (n - 1) G$