Question

Give two application each of good and bad conductors of heat

Answer 1

Answer:

Application of conductor

They are able to conduct electricity because they allow electrons to flow inside them very easily. Conductors have this property of allowing the transition of heat or light. Aluminium, copper, silver and gold are very good conductors of heat. Glass and many ceramics (tea and coffee cups and mugs for example) are poor conductors of heat.Humans and animals also.This is the reason we get electric shocks !

Application of insulator

Things which are bad conductors of heat are used as insulators. In same occasions it is important (1) to prevent heat loss from a hot body (2) to prevent heat from entering cold body.

1. The handles of saucepans, teapots, kettles, etc, are always made from substances like wood, plastic, etc, to prevent heat from entering the hand so that it can he held comfortably

2. Air is a poor conductor of heat, this is why heat from our bodies does not escape easily to the atmosphere

3. Fur, wool, cotton wool, cork, feathers, sawdust, trapped air in birds’ feathers etc. act as good insulators.

Fur and feathers keep most animals and birds during winter

Birds flutter their feathers in cold weather to trap air between their feathers

Woollen clothes keep as warm during winter

In cold countries, glass windows in houses are double paned.

Examples: rubber, wood etc....

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