electric current
It is the quantity of the electric charge to pass the flow of the electric charge with the movement of the current (Riyu who does not appear) charged particle (it is usually an electron, but there is it in the case of a positive hole / the ion) or a certain aspect in a credit hour.
I say the flow of a charged particle caused by a potential difference to a narrow sense.
A direction reverse to an electronic flow is defined as the direction of the electric current.
The unit in the international unit system of the size of the electric current is one of the SI base units at an ampere (A).
As for the sign to express quantity, I or J is common.
I call the electric current which a direct current (direct current), a direction change into by the electric current which does not change in terms of time with an interchange electric current (interchange) in terms of time.
For a method to express a current value of the interchange, actual value is usually used.
When, with many materials, an electric current does not so suddenly change; Ohm's law: Voltage = electric current X electrical resistance (E = IR) makes ends meet.
When I expressed the voltage / an electric current in actual value with pure resistance load, this ceremony is passed by the interchange.
When an electric current is called off to a material, heat (a Joule heat) occurs by the electrical resistance of the material.
When Ohm's law makes ends meet, the energy used as a Joule heat in a credit hour is in proportion to square and the resistance value of the electric current.
When I transmit electricity, electricity is used as a Joule heat, and loss of the energy produces electricity from the power station of the distant place.
Because I can reduce an electric current when even the transmission of the same electricity raises the voltage, I can reduce loss of the energy at the time of the transmission.
It is the reason why interchange is used in commercial electricity that I use the high voltage at the time of the long-distance transmission and can facilitate that I lower the voltage by a transformer to the level that I am easy to use in a neighborhood of each home / business establishment.
I say the flow of a charged particle caused by a potential difference to a narrow sense.
A direction reverse to an electronic flow is defined as the direction of the electric current.
The unit in the international unit system of the size of the electric current is one of the SI base units at an ampere (A).
As for the sign to express quantity, I or J is common.
I call the electric current which a direct current (direct current), a direction change into by the electric current which does not change in terms of time with an interchange electric current (interchange) in terms of time.
For a method to express a current value of the interchange, actual value is usually used.
When, with many materials, an electric current does not so suddenly change; Ohm's law: Voltage = electric current X electrical resistance (E = IR) makes ends meet.
When I expressed the voltage / an electric current in actual value with pure resistance load, this ceremony is passed by the interchange.
When an electric current is called off to a material, heat (a Joule heat) occurs by the electrical resistance of the material.
When Ohm's law makes ends meet, the energy used as a Joule heat in a credit hour is in proportion to square and the resistance value of the electric current.
When I transmit electricity, electricity is used as a Joule heat, and loss of the energy produces electricity from the power station of the distant place.
Because I can reduce an electric current when even the transmission of the same electricity raises the voltage, I can reduce loss of the energy at the time of the transmission.
It is the reason why interchange is used in commercial electricity that I use the high voltage at the time of the long-distance transmission and can facilitate that I lower the voltage by a transformer to the level that I am easy to use in a neighborhood of each home / business establishment.
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