Write an activity to show charging of a plastic comb by the method of friction. (class 8)
please help
Answers
We rub a plastic comb with our dry hair and bring it near tiny pieces of paper. We will find that the comb attracts the tiny pieces of paper towards itself. Due to this attraction, the tiny pieces of paper move towards the comb and stick to it. Actually, when we rub the plastic comb with our dry hair, the plastic comb gets electric charge due to friction. The electrically charged comb then exerts an electric force on the tiny pieces of paper and attracts them.
If we rub one end of a pen made of plastic with a sheet of paper (or even with our dry hair) for about one minute and then bring it near tiny pieces of paper, it attracts the tiny pieces of paper. Due to this attraction, the tiny pieces of paper stick to the pen. Here also the plastic pen gets electric charges on rubbing with a sheet of paper (or dry hair). The electrically charged pen then exerts an electric force on the tiny pieces of paper and attracts them.
If we take an inflated rubber balloon and rub it carefully with a piece of woollen cloth and then touch it with a wall, the balloon sticks to the wall. When we rub the rubber balloon with a woollen cloth, the rubber balloon gets electric charges due to friction.
This electrically charged balloon then exerts an electric force of attraction on the wall due to which it sticks on the wall.
The electric charges which appear on a plastic comb or plastic scale (rubbed with dry hair), on plastic pen (rubbed with a sheet of paper) and on a rubber balloon (rubbed with a piece of woollen cloth) are the static electric charges (or stationary electric charges) which remain bound to the surface of an object and do not move. The static electric charges are also known as charges at rest.
mark me as Brainliest
foll.ow me
th.ank me