Electric current
Electric Current
Electric current (/ɪˈlɛktrɪk ˈkʌrənt/) is the flow of electric charge in a conductor. The term originated from the Latin word 'currere', which means 'to run'.
Definition
Electric current is defined as the rate at which electric charge flows past a point in a circuit. The SI unit for measuring an electric current is the ampere, which is equal to one coulomb per second.
Types
There are two types of electric current: direct current (DC) and alternating current (AC). Direct current is a type of current where the flow of electric charge is only in one direction. On the other hand, alternating current is the type of current in which the flow of electric charge periodically reverses direction.
Measurement
Electric current is measured using a device called an ammeter. The SI unit for electric current is the ampere (A).
Effects
Electric current can produce several effects such as heating, magnetic, and chemical effects.
Related Terms
- Voltage: The electric potential difference between two points.
- Resistance: The opposition to the flow of electric current.
- Conductivity: The measure of a material's ability to conduct an electric current.
- Ohm's Law: The relationship between voltage, current, and resistance.
External links
- Medical encyclopedia article on Electric current
- Wikipedia's article - Electric current
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