3. A balloon is charged by rubbing it on a wool sweater, giving it extra electrons. The balloon i then brought near a neutral wall. a. Is the balloon positively or negatively charged? b. A spot on the wall will have a charge induced on it by the balloon. Will this spot be positive or negative? c. If the balloon is released very close to this spot, will it be attracted or repelled by the spot?

## Step 1<br />The balloon is charged by rubbing it on a wool sweater. This process is known as charging by friction, where electrons are transferred from the wool sweater to the balloon. As a result, the balloon gains extra electrons, making it negatively charged.<br /><br />## Step 2<br />When the balloon is brought near a neutral wall, it induces a charge on the wall. The balloon, being negatively charged, will induce a positive charge on the wall. This is because the balloon's negative charge repels the electrons in the wall, causing the wall to become positively charged in the area closest to the balloon.<br /><br />## Step 3<br />The balloon, being negatively charged, will be attracted to the positively charged spot on the wall. This is due to the principle that opposite charges attract each other.