On rubbing a balloon on your hair, it sticks on the wall. Why?

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Solution

This is due to static charge build up that occurs as electrons gets swapped from one material to another. Rubbing provides energy (in the form heat due to friction) to the electrons of one material and they jump out and get transferred.
This charge is nothing but static charge and because of this charge the balloon stick to the wall.

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Q. Why does a balloon stick to a wall after being rubbed against your hair?

Q. On a cold, dry day, a child takes two balloons and rubs them against his sweater.
(a) When taken near each other, the balloons repel each other.
(b) When one is taken near the wall, it sticks to it.
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Question 7
An inflated balloon was pressed against a wall after it has been rubbed with a piece of synthetic cloth. It was found that the balloon sticks to the wall. What force might be responsible for the attraction between the balloon and the wall?

If you rub a metal comb in your hair it does not get charged why

Q. Give reasons for the following:
(a) Your hair stands on its ends while removing a sweater or when you pull off your hat.
(b) You see a streak of lightning before you hear the thunder associated with it.
(c) A rice grain tied to a thread is attracted to a plastic comb that was just used to comb hair.
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