Electric current is a flow of atomic particles called electrons. Certain materials , called conductors, allow electrons to flow through them. Most metals (copper, iron) are good conductors of electricity. Electrons will flow from the “-” electrode of a battery, through a conductor, towards the “+” electrode of a battery. Volts (voltage) is a measure of the force moving the electrons.
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When current flows through a conductor, a magnetic field is formed around the conductor.
通有电流的导体在其周围会产生磁场。
In current through a conductor joule heat generated by the electric furnace for the heat source.
以电流通过导体所产生的焦耳热为热源的电炉。
Microwave energy is a natural phenomenon that occurs when electric current flows through a conductor.
微波能量是一种自然能量，当电流通过导体时才发生。
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