Question

A galvanometer may be converted into ammeter or a voltmeter. The resistance of the device so obtained will be the largest in case of

• A. ammeter of range $1A$
• B. ammeter of range $10A$
• C. voltmeter of range $1V$
• D. voltmeter of range $10V$

Answer 1

The correct option is D voltmeter of range $10V$

$V=iR$
So, $V\alpha R$
So, resistance is largest in case of voltmeter with highest range.