Question

why alloys are commonly used in electrical heating devices?give reason​

Answer 1

Alloys are commonly used in electrical heating devices because -

• The electrical conductivity and melting point of an alloy is less than that of pure metals.

• Example - Brass, an alloy of Copper and Zinc and Bronze, an alloy of Copper and Tin are not good conductors of electricity whereas copper is used for making electrical circuits.

• So, an alloy of lead and Tin has a low melting point and is used for welding electric wires together.

• If an alloy consists of mercury as one of its components it is called Amalgam.

• Example = sodium - mercury amalgam and silver - mercury amalgam.