Question

Two statements are given - one labelled Assertion (A) and the other labelled Reason (R). Read the statements carefully and choose the option that correctly describes statements A and R. Assertion (A): An alloy may be a compound consisting of a metal and a non-metal. Reason (R): An alloy is made by melting a metal and then dissolving other elements in it in definite proportions.

Why are alloys preferred over pure metals to make the heating elements of electrical heating devices?

If the conductor A is made of copper and the conductor C is made of constantan (alloy of copper and nickel), then which one of the two will have more electrical resistance and why ?