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Electric current, Electrical Engineering
Electric current is a flow of electrons. Each electron carries a very small amount of negative charge (1.6 x 10
A current of 1 amp at a point in a circuit is the flow of 1 coulomb of charge per second flowing past that point. This means that approx 6 x 10
electrons must pass the point every second. This is a huge number.
Electrons circulate continuously round a circuit being pumped round by a power source.
If more than one route round the circuit is available then the electron flow will divide (in some ratio) between the available routes.
Electrons will not be lost - all those that emerge from the power source will eventually return to it.
To pump the current through any resistors in the circuit requires a voltage to be developed across them (think of it as a pressure difference required to push a fluid through a restriction)
Posted Date: 8/20/2012 11:42:01 PM | Location : United States
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