Question

Alloys have low melting points than pure metals. Then why they r used to make bread toasters, electric heater etc?

Answer 1

Dear Student

Alloys are combination of one or two metals. Though metals possess useful properties like good conductivity and high strength, alloys combine these properties making a metal useful for a particular application. When metals are alloyed, properties like their melting point, conductivity etc are affected.
There are coils inside electrical appliances that take part in electrical heating. Electrical heating is a process in which electrical energy gets converted to heat energy. The size and shape of the coil varies according to its use. Modern home appliances use nichrome which is wound in coils that produce heat when current passes through the coil.
For a heating element, you want to use a metal with a high electrical resistance, and a high melting point (obviously). If this heating element is going to be exposed to air and/or water, it also needs to be corrosion resistant.
Regards