Question

ordinary rubber a insulator but the type of aeroplanes are made a little bit conducting why

Answer 1

so that the tyres of the aircraft do not burn during landing

Answer 2

Answer:

The tyres of aircrafts are highly charged during landing to friction between the tyres and the airstrip. If the tyres are slightly conducting, the charge will not accumulate on them and will leak to the earth.

This is the reason why ordinary rubber a insulator but the type of aeroplanes are made an little bit conducting.