→Start with the original set-up & showing all charges
→ Now use the phet to answer the following questions.
5. Rub the yellow balloon on the sweater until you get all of the blue negative charges on the balloon. When you rub two things together and there is a transfer of negative charge, this charge distribution is called friction. Now, drag the balloon in between the wall and the sweater. Then release the balloon to see what happens. Explain what happened and why.
Type Answer HERE:
6. Now take that same balloon and drag it over to the wall. You will notice that the blue negative charges move away in the wall and then the balloon sticks to the wall. This charge distribution is called induction, because the negative charges move without any touching. Why does the balloon stick to the wall?
Type Answer HERE:
5. When the yellow balloon is rubbed on the sweater, it gains a surplus of negative charges (blue charges). This is because rubbing creates friction which causes the transfer of electrons from the sweater to the balloon. When the charged balloon is dragged between the wall and the sweater, the negative charges on the balloon repel the negative charges on the wall. This repulsion causes the balloon to be attracted to the sweater and stick to it.
6. When the balloon is brought to the wall, the negative charges on the balloon cause the negative charges in the wall to repel. This repulsion pushes the negative charges in the wall away from the balloon, resulting in a net positive charge on the surface of the wall close to the balloon. The positive charges attract the negative charges on the balloon, causing the balloon to stick to the wall. This is known as induction, as the negative charges on the balloon induce a redistribution of charges in the wall without any direct touching.