Which element is used to make the coils used in water heaters?

Options

A. Copper
B. Nichrome
C. A mixture of aluminium and copper
D. A mixture of iron and steel

Answer

B

Explanation

Nichrome is generally used to make the coils used in water heaters because of its relatively high resistance and high melting point. It consists of 80% nickel, 20% chromium. Nichrome 80/20 is an ideal material. It forms an adherent layer of chromium oxide when it is heated for the first time.