P2: Dangers of static elsetricity, Charge and current

Question	Answer
Dangers of static electricity	-explosions Fuel out of a filler pipe builds up a static. Leads to a spark. Explodes in a dusty fumey place.
Uses of static electricity	-electrostatic spray paint Spray gun charged, charges paint. Paint repels eachother=fine spray. Object is opposite charge attracts all paint. -even coat -not much waste paint -paints all object even when facing away from spray.
How to prevent electrostatic charge building up?	-Earth objects Connects charged object to ground. Easy oute for static charges. No charge build up. Electrons go up=Positive charge Electrons go down=Negative charge
Current?	-Rate of flow of charge round the circuit. Current will only flow if there is a voltage across that component.
Voltage	(potential difference)Driving force that pushes current around.
Resistance?	Anything in circuit which slows flow down.
There is a balance?	Voltage trying to push the current around the circuit. Resistance opposing it. Relative size of voltage and resistance decide how big the current.

Resource summary

	Created by paigeysonghurst over 10 years ago