A galvanometer can be converted into a voltmeter by connecting it with which of these?

Correct answer: (c) A high-resistance wire in series

Explanation

A galvanometer is converted into a voltmeter by connecting a high resistance in series with it. The high resistance lets only a tiny current flow, so the instrument hardly disturbs the circuit, and its scale can read large voltages. An ideal voltmeter has infinite resistance and is connected in parallel across the part being measured.

A galvanometer becomes an ammeter with a low resistance (shunt) in parallel.