d Current

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d ij A dq idqEECIjdAPdB Current (electric current), particle charge (usually in the case of a hole ion the electrons) flow of charge due to the move, which is the amount of the charge to pass the time on one level or unit . `A dNdqB The narrow sense, means a flow of charged particles caused by the potential difference. dqtd`B Is defined as the direction of the current direction and reverse the flow of electrons. dPnPAyA i A jA SI{PB System of units in unit International of magnitude of current is ampere (A) in, SI is one of the basic unit. \LIJIB Symbol that represents the amount of I or J is the common practice.

Idd ijAIdd ijB Current DC current does not change in time (direct current) current to AC current changes in the time direction (exchange) is called. dl\@AlgB As a way of representing the current value of the exchange, the value used effective.

Ad}I[@ : d =d~ dCR idhqjB In many substances, Ohm's law if you do not change rapidly so current: voltage = current ~ resistance electrical (E = IR) is based. RgpAdEdl\AB Using a pure resistive load, when expressed in the RMS voltage and current, this expression is established in the AC.

dAdCRMi W[M jB And current material, thermal resistance of the material electric (Joule heat) occurs. I[@APW[MGlM[d2RlB Ohm's law is valid if the energy is consumed as Joule heat in unit time is the current that is proportional to the square of the resistance.

dddAdW[MA GlM[XB When the transmission power from the power plant from a distance, the power consumed as Joule heat, which the loss of energy. ddAddAdGlM[XB The same power transmission can be reduced to increase the voltage and current, can reduce energy loss during transmission. ddgAeEgxdeApdgRB When long-distance transmission of high voltage use, can be easily and lower the voltage transformer to a level close to the ease of use in place of the home, which is why the power is used in commercial exchanges.

[ W ] A See also

• dx Current density
• d Current measurement
• d Current source
• d Voltage source
• dv Ammeter
• d Voltage
• dv Voltmeter
• d Power
• dv Wattmeter
• dCR Measurement of electrical resistance
• d Voltage measurement
• d Dark current
• ed Ampacity
• nd Current Location
• d Displacement current
• Direct current
• Parallel flow

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