Question

What are the different types of electrical power?

Answer 1

Electrical power:

The rate at which electrical energy is consumed or dissipated into other forms of energy is called an electrical power.

1. Power is denoted by $P$.
2. The S.I unit of power is $Watt$.

The mathematical representation for power is $\mathrm{P}=\mathrm{V}\times \mathrm{I}$.

Here, $V$ is the voltage and $I$ is the current.

Types of electrical power:

There are two types of electrical power such as:

1. DC power - It is defined as the product of voltage and current and is produced by DC sources like generators, batteries, fuel cells, etc.
2. AC power - A flow of charge that exhibits a periodic change in direction is called AC power.

AC power is further bifurcated into three types as follows:

1. Apparent power - It is the product of the root-mean-square current and the root-mean-square voltage. It is the ideal power and is represented by $S$. The mathematical expression for apparent power is $\mathrm{S}={\mathrm{V}}_{\mathrm{rms}}\times {\mathrm{I}}_{\mathrm{rms}}$.
2. Active power - It is the amount of power consumed or used within an alternating current circuit. It is the real power and is represented by $\mathrm{P}$. The mathematical expression for apparent power is $\mathrm{S}={\mathrm{V}}_{\max }\times {\mathrm{I}}_{\max }\mathrm{cos\varphi }$. Here, $\mathrm{\varphi }$ is the impedance phase angle between the voltage and the current.
3. Reactive power - Reactive power is the power developed in the circuit and is represented by Q. The mathematical expression for apparent power is $\mathrm{Q}={\mathrm{V}}_{\mathrm{rms}}\times {\mathrm{I}}_{\mathrm{rms}}\mathrm{sin\varphi }$.