Induction
What is induction in static electricity?
It is the process of charging an object without touching it, by bringing a charged object nearby.
Why can static electricity be dangerous in petrol stations?
A spark can ignite petrol vapour and cause fires or explosions.
Name one everyday device that uses static electricity.
Photocopiers / laser printers / spray painting / air filters.
A charged rod is brought near a neutral metal sphere. What happens to the charges in the sphere?
Charges redistribute: opposite charges move closer to the rod and like charges move away.
Why do fuel trucks in the UAE use grounding chains?
Grounding allows excess charge to safely flow into the Earth, preventing sparks.
How does static electricity help remove dust in air purification systems?
Charged dust particles are attracted to oppositely charged plates and get trapped.
Using the PhET simulation, explain why a neutral object is attracted to a charged one.
The charges rearrange in the neutral object, creating a net attractive force due to closer opposite charges.
UAE oil refineries require workers to wear anti-static clothing. Evaluate why this is important.
It prevents charge buildup, reduces spark risk, and improves safety in flammable environments.
Electrostatic spray painting is used in car factories. Why is it more efficient than normal painting?
Paint is attracted to the car surface, reducing waste, improving coverage, and saving cost.