Mention two special features of the material to be used as an element of an electric iron.

(N/A) The material used for the heating element of an electric iron must possess the following two special features:
$(a)$ High resistivity: This ensures that the material produces a large amount of heat when an electric current passes through it,according to Joule's law of heating $(H = I^2Rt)$.
$(b)$ High melting point: This prevents the element from melting or breaking down even when it becomes extremely hot during continuous operation.