What happens when you rub a glass rod with silk cloth and bring it near a plastic straws?

When you rub a glass rod with a silk cloth, the glass rod becomes positively charged due to the transfer of electrons from the silk cloth to the glass rod. When you bring the positively charged glass rod near a plastic straw, the negative charges in the plastic straw are attracted to the positive charges on the glass rod. This causes the plastic straw to be attracted to the glass rod and may even cause the plastic straw to move towards the glass rod. This is due to the electrostatic force of attraction between the positively charged glass rod and the negatively charged plastic straw.

When you rub a glass rod with a silk cloth, the rod becomes positively charged and the cloth becomes negatively charged due to the transfer of electrons. If you then bring the positively charged glass rod near a plastic straw, the negative charges in the straw will be attracted to the positive charges on the rod. This attraction will cause the straw to move towards the rod.

The strength of the attraction will depend on the amount of charge on the rod and the distance between the rod and the straw. The closer the rod is to the straw, the stronger the attraction will be. If the rod is close enough, the straw will eventually touch the rod.

This phenomenon is known as electrostatic attraction. It is one of the basic principles of physics and is responsible for many everyday phenomena, such as the attraction between a magnet and a piece of metal.