Problem

A galvanometer gives full scale deflection with

0.006\,\text{A}

current. By connecting it to a

4990\,\Omega

resistance, it can be converted into a voltmeter of range

0

30\,\text{V}

. If connected to a

\frac{2n}{249}\,\Omega

resistance, it becomes an ammeter of range

0

1.5\,\text{A}

. The value of

n