Electric power can be defined as the rate of doing work. The SI unit for power is watt is denoted as P. Power formula connects the time, voltage and charge. Individuals can alter the formula using Ohm's law.

Electric Power Formula

The primary formula for electric power (P) in an electrical circuit is expressed by:

                      P = V×I

Where:

P = Power (measured in watts, W)

V = Voltage measured in volts, V

I = Current measured in amperes, A

The power formula written in terms of Ohm's law is

or

Where

• the electric charge is Q

• the voltage is V

• time is t

• resistance is R

Electric Power Solved Problems

Let us learn the numerical of electric power in detail in this section.

Problem 1: If the current and voltage of an electric circuit are given as 2.5A and 10V respectively.Find the electrical power

Solution:

Given measures are,

I = 2.5A and V = 10V

The formula for electric power is,

         P = VI

         P = 10 × 2.5 = 25 watts

Problem 2 : Calculate the power of electrical circuit comprising the resistance 3Ω and current 4A flowing through this circuit?

Solution:

The given parameters are,

I = 4A and R = 3Ω

The formula for electric power is,

P = 42×3

P = 16×3 = 48 watts

Electric power formulas need to be understood in relation to analyzing electrical systems and designing electrical systems. It would thus relate either to house circuit applications or anything else known to require industrial application.

 

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