Electrical Engineering ⇒ Topic : Quantity of Electricity
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Samual
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Quantity of Electricity The unit of the quantity of electricity or electric charge passing through a circuit is the coulomb. Its symbol is C. Coulomb is defined as "the quantity of electric charge passing a given point in a circuit when a current of 1 ampere is maintained for 1 second". It is expressed as Q (Coulombs) = 1 (amperes) x t (seconds) ...........(1) For example, if a current of 5 A flows through a circuit for 10 seconds, the quantity of electricity that passed through the circuit is 5 x 10 = 50 C.Conversely, 1 ampere of current can be defined as the flow of 6.28 x 1018 electrons per second at a given point in the circuit. | |
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