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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