Why is phosphor bronze alloy preferred for the suspension wire of a moving coil galvanometer?

Explanation

The suspension wire of phosphor bronze alloy is preferred in moving coil galvanometer because it has several advantages:
(i) Its restoring torque per unit twist is small. Due to it, the galvanometer is very sensitive.
(ii) It has great tensile strength so that even if it is thin, it will not break under the weight of the coil suspended from its end.
(iii) It is rust resisting. Hence it remains unaffected by the weather conditions of air in which it is suspended.