1. Charging by Induction and Grounding
ELECTRICITY

2. Learning Goals To be able to explain charging by induction
To be able to explain grounding

3. Induced Charge Separation

4. Induced Charge Separation
The electrons shift in position because a charged object is brought near it
This explains how a charged balloon is attracted to a neutral wall
A temporary charge is induced in a wall when a charged balloon is brought close to the wall

5. Charging by Induction
A neutral object is charged by bringing a charged object close to, but not touching, the neutral object

6. Grounding
A charged object can be made neutral by adding or removing electrons
Grounding – removing charges from objects by contact with a large neutral object

7. If the object is Negative If the object is Positive
Electrons leave the object
Electrons enter the object + - +

8. Discharging and Grounding

9. Discharging and Grounding
Electric discharge occurs when the hand gets close enough to the faucet
Excess electrons are RAPIDLY transferred from the hand to the faucet
The faucet is grounded (connected to Earth)
Both the hand and the faucet are neutral

10. Application
Technicians working on electronic devices always make sure they are grounded to avoid damage to equipment
For large ocean ships, the ocean acts as a ground
For planes, the body of the plane acts as a ground for the electronic devices on the plane

11. Success Criteria I CAN explain charging by induction
I CAN explain grounding