1. Uses and Dangers of Static Electricity

2. Review – What is Static Electricity?

4. Static Electricity Problems and Dangers Uses
Refueling aircraft and vehicles
Lightening
Uses
Cleaning Smoke and Chimneys
Photocopying
Laser Printing
Spray Painting

5. Removing Smoke from Chimneys
Negatively charged grid adds electrons to smoke particles
Smoke particles now have a -ve charge
Attracted to +ve collecting plate
Discharged and fall into collecting plate

6. Spray Painting Even cover of paint Less wastage
Advantages
Even cover of paint
Less wastage
Paint attracted to areas normally difficult to access

7. Photocopying

8. Refueling Aircraft and Cars
Plane can be charged by friction during flight
Fuel can be charged as is flows through pipe
Spark ignites gas while filling car
Preventing static on aircraft

9. Lightening Convection currents within clouds Friction (hailstones)
Discharge to earth

10. Shocks

11. Grounding
Using a conductor to allow movement of electrons to neutralise static charge
Safety precaution that prevents static sparks from starting fires
Charge on Object
Movement of Electrons During Grounding
Positive
From earth to object
Negative
From object to earth

12. Learning Check
Explain some of the dangers of static electricity and explain how electrostatic charges can be discharged safely