Electric Power Formula


Electric Power Formula

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

The power formula’s  alternate arrangement by making use of Ohm’s law is

the electric charge is Q
the voltage is V
the time is t
the resistance is R

Electric Power Solved Examples

Let us check out the numerical of electric power in detail in this segment.

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

Given measures are,
I = 2.5A and V = 10V
The formula for electric power is,
P = VI
P = 10 × 2.5 = 25watts

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

Given parameters are,
I = 4A and R = 3Ω
Electric power formula is,
P = I2R

P = 42×3
P = 16×3 = 48 watts

The Energy consumption is given by,

Therefore, the energy consumption is 3600J


Practise This Question

When n - hexane is heated with Mo2O3 at 5000C and 20 atmospheres, the following changes takes place

A. Hybridisation of carbon changes                    B.No of C - C bonds increases

C. No of C - H bonds decreases                        D. Percentage of carbon increases