Why are coils of electric toasters and electric irons are made of an alloy rather than a pure metal?

Why are coils of electric toasters and electric irons made of an alloy rather than a pure metal?

Explain the following. a] Why is tungsten used almost exclusively for filament of electric lamps? b] Why are the conductors of electric heating devices, such as bread-toasters and electric irons made of an alloy rather than a pure metal? c] Why is the series arrangement not used for domestic circuits? d] How does the resistance of a wire vary with its area of cross-section? e] Why are copper and aluminum wires usually employed for electricity transmission?

i] Heating elements of electrical heating devices is made up of an alloy rather than a pure metal. Give two reasons. ii] Four resistors of 2Omega each are joined end to end to form a square. Calculate the equivalent resistance of the combination between two adjacent corners?

Why element of electrical heating devices are made up of alloys ?

Why is an atom electrically neutral?