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 9 years ago