Electrons are negatively charged particles and they transfer energy through wires by means of electrical currents.
Charge is a property of a body which experiences a force in an electric field. Charge is measured in coulombs (C).
Since electrons are so small and one electron will not have much of an effect anywhere, it is more useful to refer to packages of electrons. One coulomb of charge is a package equivalent to 6,250,000,000,000,000,000 electrons.
When current flows, electrical work is done and energy transferred. The amount of charge passing a point in the circuit can be calculated using the equation:
This is when:
One amp is the current that flows when one coulomb of charge passes a point in a circuit in one second.
A current of 1.5 amps (A) flows through a simple electrical circuit.
How many coulombs of charge flow past a point in 60 seconds?
How much charge has passed a point in a circuit if a current of 13 A flows for 10 s?
How much current flows when 10 C passes down a wire in 2 s?