Electric power
Electric Power
Electric power (/ɪˈlɛktrɪk ˈpaʊər/) is the rate, per unit time, at which electrical energy is transferred by an electric circuit. The SI unit of power is the watt, one joule per second.
Etymology
The term "electric power" is derived from the Latin electricus, meaning "like amber", and the Greek dynamis, meaning "power". The term was first used in the context of physics by Scottish scientist James Watt in the 18th century.
Definition
Electric power is defined as the rate at which electrical energy is consumed or produced by a device. It is calculated as the product of the voltage across the device and the current flowing through it.
Related Terms
- Electricity: The set of physical phenomena associated with the presence and motion of matter that has a property of electric charge.
- Electric Circuit: A path in which electrons from a voltage or current source flow.
- Voltage: The electric potential difference between two points.
- Current: The rate at which electric charge flows past a point in a circuit.
- Watt: The SI unit of power, equivalent to one joule per second, corresponding to the power in an electric circuit in which the potential difference is one volt and the current one ampere.
- Joule: The SI unit of work or energy, equal to the work done by a force of one newton when its point of application moves one meter in the direction of action of the force.
See Also
External links
- Medical encyclopedia article on Electric power
- Wikipedia's article - Electric power
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