the electric current
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19 Terms
electron
it is a very small particle that rotates around the nucleus
nucleus
it is found in the center of the atom and contains two particles called protons and neutrons
the electron rotates around the nucleus
due to the attraction force between the nucleus and electrons
electric current
it is the flow of negative charges through a conducting material
the atom is electrically neutral
because the number of protons in the nucleus equals the number of electrons that rotate around the nucleus
the nucleus is positively charged
because it contains protons and neutral neutrons
the electric current intensity
it is the quantity of electricity in coulomb or the electric charges flowing through a cross section of the conductor in one second
the ampere
it is the electric current intensity passing through a circuit when a quantity of charge of one coulomb passes through a given cross section in time of one second
the coulomb
it is the quantity of charge transferred by a constant current intensity of one ampere in time of one second
the ammeter apparatus
it is used in measuring the electric current intensity passing through a circuit
the electric potential of a conductor
it is the state of an electric conductor that shows the the transfer of electricity from or to it, when it is connected to another conductor.
two conductors that have the same electric potential are connected by a wire
no electric current will pass through through them, because there is no potential difference between them
the potential difference across two terminals of a conductor
it is the value of work done to transfer a quantity of charge of one coulomb between the two poles of this conductor
the volt
it is the potential difference across two terminals of a conductor on doing a work of one joule to transfer a quantity of charge one coulomb
the electromotive force
it is the potential difference between the two poles of the battery when the electric circuit is open
measuring unit of the potential difference
volt
measuring unit of the work
joule
measuring unit of quantity of electricity
coulomb
measuring unit of electromotive force
volt