An inflated balloon is charged by rubbing it with fur . Will it stick readily to a conducting wall or to an insulating wall ? Explain

Ans : It will stick readily to the conducting wall because the same amount of charge is induced on the wall . But on the insulating wall , less amount of charge is induced . Due to greater force of attraction , it will stick more readily to the conducting wall.

Can two equipotential surfaces intersect ?

Q : Can two equipotential surfaces intersect ?

Ans : No , two equipotential surfaces can never intersect because if they intersect at a point , the electric field at a point can have two directions simultaneously , which is impossible .

Q . Ordinary rubber is an insulator . But the special rubber tyres of aircraft are made conducting . why is this necessary ?

Ans : To conduct away electricity produced by friction .