Question

These are generally the bad conductor of heat-
(a) Natural fibre
(b) Synthetic fibres
(c) Cranes
(d) Plastics

Answer 1

Answer:

plastic or natural fibre

Answer 2

Answer:

(d) Plastics

Explanation:

The fibres are not very good conductors of heat. However, when we compare amongst the options given here to us we can clearly say that plastics are the bad conductors of heat as they melt when exposed to the higher temperature but don't conduct heat through them.

The fibres on the other hand have some air pores between them and the air is not a good conductor of heat but as compared to that of plastics it is better.

Therefore, Plastics are not a good conductor of heat.

Hence, the correct option is (d).