Explain the following.
1. Why is tungsten commonly chosen as the filament in electric bulbs?
Tungsten is commonly used as a filament in electric bulbs because of its properties. Those are
(i) It has .
(ii) It has a .
(iii) It is not easily .
2. What makes alloys more suitable than pure metals for use in electric heating appliances?
The conductors of electric heating devices are made of alloys rather than a pure metal because it has , and are not easily .
and is preferred as a heating element in electrical appliances such as bread-toasters and electric irons.