Understanding Electrostatic Interaction with Water

In this video, a simple experiment is conducted using a straw, paper towel, a tray, and a PET bottle with water. The experiment demonstrates how a charged straw can influence a thin stream of water due to static electricity. By rubbing the straw with a paper towel, it becomes charged and can attract the water stream, causing it to bend. This interaction is explained by the electric field around the charged straw affecting the polar water molecules. Finally, the video shows that wetting the straw neutralizes its charge, stopping the attraction.

What materials are required to set up the experiment to observe the interaction between a charged straw and water?

• A metal rod, a glass of milk, and a plastic bag

• A piece of cloth, a cup of oil, and a metal spoon

• Straws, paper towels, a tray, and a PET bottle with water

• A wooden stick, a bowl of sand, and a rubber band

How is the straw charged in the experiment?

• By soaking it in water

• By placing it in a freezer

• By rubbing it with a paper towel

• By heating it over a flame

What happens to the water stream when the charged straw is brought close to it?

• The water stream freezes

• The water stream changes color

• The water stream deflects

• The water stream evaporates

What is the role of the electric field in the interaction between the charged straw and the water stream?

• It heats the water

• It changes the water's chemical composition

• It creates a magnetic field

• It causes the water to deflect

What effect does wetting the straw have on its charge?

• It increases the charge

• It neutralizes the charge

• It doubles the charge

• It has no effect on the charge