GEOLOGY

Detailed explanation-1: -Similarly, when you rub a balloon on your head it causes opposite static charges to build up both on your hair and the balloon. Consequently, when you pull the balloon slowly away from your head, you can see these two opposite static charges attracting one another and making your hair stand up.

Detailed explanation-2: -Electrostatic charges are not caused by friction, although many assume this to be the case. Rubbing a balloon on your head or dragging your feet on the carpet will build up a charge, but so will ordinary walking or repeatedly touching your head with a balloon!

Detailed explanation-3: -Rubbing the balloon against hair causes electrons to move from the hair to the balloon. Because electrons are negatively charged, the balloon acquires a negative charge, while the hair, with its loss of negative charges, now has a net positive charge.

Detailed explanation-4: -Option D is correct: Rubbing a balloon on hair is an example of static charge build-up created by conduction.

Detailed explanation-5: -Scientists have long known that rubbing two materials, such as a balloon on hair, causes electrostatic charging.