Question

Question 10

Give reasons:

(i) Electric boards fitted on the wall made of plastic or wood.

(ii) The handle of the cooker is made of plastic.

Answer 1

(i) Plastic or wood are bad conductors of heat and electricity. Electric boards are made up of plastic or wood. So that while touching we will not get an electric shock.

(ii) Cooker is made of metal. When food is cooked in it, it gets heated and the whole of its body becomes hot due to thermal conductivity. Hence with the plastic handle, we can easily lift the hot cooker as plastic is a bad conductor of heat.