The tyres of air craft are made of special rubber which make them slightly conducting. Explain the reasons for using special rubber.

(a) A comb run through one’s dry hair attracts small bits of paper. Why? What happens if the hair is wet or if it is a rainy day? (Remember, a paper does not conduct electricity.) (b) Ordinary rubber is an insulator. But special rubber tyres of aircraft are made slightly conducting. Why is this necessary? (c) Vehicles carrying inflammable materials usually have metallic ropes touching the ground during motion. Why? (d) A bird perches on a bare high power line, and nothing happens to the bird. A man standing on the ground touches the same line and gets a fatal shock. Why?

Which of the following barrier methods are made of rubber ?

What characters of seed plants make them specially adapted to life on land ?

The metal used for making air crafts and rockets is

Assertion: The tyres of aircraft's are slightly conducting. Reason: If a conductor is connected to a ground, the extra charge induced on conductor will flow to ground.