What is meant by figure of merit of a galvanometer?

The figure of merit of a galvanometer is

What is a galvanometer?

What is a galvanometer ?

A resistance of 900Omega is connected in series with a galvanometer of resistance 100Omega . A potential difference of 1 Volt produces 100 division deflection in galvanometer. Find the figure of merit of galvanometer.

A resistance of 900 ohm is connected in series with a galvanometer of resistance 100 ohm. A potential difference of 1 V produces a deflection of 100 division in the galvanometer. Find the figure of merit of galvanometer.

When a galvanometer having 30 divisions scale and 100Omega resistance is connected in series with the battery of e.m.f. 3 volt through a resistance of 200Omega , it shows full scale deflection. Find the figure of merit of the galvanometer in microampere.