Electrical Charge

Question 0

Da balloon experiment (3)

Answer 0

A negatively barged balloon touches a surface

The positive charges will attract and the balloon will stick will the negative charges of the wall will be repelled

Question 1

Charging by friction

Answer 1

Rubbing a material with a cloth can rip electrons from the material and so the charges are imbalanced

Question 2

Uses of static electricity

Answer 2

Spray painting - paint droplets will be attracted to the oppositely charged frame
Inkjet printers - charged ink droplet is guided by altering currents on the deflecting plates
Photocopiers - a certain image is charged on the drum, a powder is blown on and deposited as an image on paper

Question 3

Dangers of static electricity

Answer 3

1. An aircraft gains charge when flying
   This charge can escape to earth hen refuelling and can ignite the fuel
   To solve this, aircraft are earthed before refuelling
2. Screens become charged with static electricity and attracts dust particles
   Therefore, you can have problems watching TV
3. Our clothing can gain static electricity and can give us a little shock