Elektrivõimsuse

Elektrivõimsus, also known as electrical power, is a measure of the rate at which electrical energy is transferred by an electric circuit. It is typically measured in watts (W), which is equivalent to one joule per second (J/s). The formula for calculating electrical power is P = V * I, where P is power, V is voltage, and I is current.

Electrical power can be either real or apparent. Real power, also known as active power, is the power that actually does work, such as heating or lighting. It is measured in watts and is the product of voltage and current. Apparent power, on the other hand, is the product of voltage and current without considering the phase angle between them. It is measured in volt-amperes (VA) and includes both real and reactive power.

Reactive power is the power that is stored and released by reactive components in a circuit, such as inductors and capacitors. It does not do any work but is necessary for the operation of certain devices, such as motors and transformers. Reactive power is measured in volt-amperes reactive (VAR).

Electrical power is a fundamental concept in electrical engineering and is used in the design and analysis of electrical systems. It is also an important factor in the selection of electrical equipment, such as generators, motors, and transformers. Understanding electrical power is essential for ensuring the safe and efficient operation of electrical systems.