Electrostatics and Electricity

Law of Electrostatics

like charges repel, unlike charges attract each other. Electrostatic charges act over a distance

The law of conservation of electrical charge

The net charge of an isolated system stays constant during any physical change.

Electric current

The amount of charge that flows past a pint per second

Conventional flow notation

Electric charge moves from the positive side of the battery to the negative side

current strength

the amount of charge passing a point in the circuit in one second

Cell/battery

The source of energy in the circuit

Potential Difference/ Voltage

the amount of energy gained or lost by a unit of charge

Conductors

Substances that allow the flow of electric charge through them

Resistance

the opposition that a conductor offers to the flow of charge through it

ampere

the current flowing through a circuit when one coulomb of charge flows past a point in one second

Ohm's Law

for a conductor at constant temperature, the current in the conductor in directly proportional to the voltage across it

emf

The total amount of electrical energy that a battery can supply

one ohm

a current of one ampere passes through a conductor when a potential difference of one volt is maintained across it's ends