built up of static energy- caused by friction (balloon)
electrons our scraped of one and dumped onto the other. - insulating material
leaves positive static on one and negative on other
similar charges repel
opposite charges attract
electric current = flow of charge
electric current measured in VOLTS e.g V
circuit wires are made of : metal with plastic cover
the plastic cover= insulator ( stops the current flowing)
battery- pushes the charge through the wires like a pump.
current depends on voltage and resistance...
voltage = driving force that pushes current around. units= volts aka V
resistance = stops/slows down the flow of current. units = ohms aka Ω
increase votage = more current flows
increase resistance = less current flows