Courses
Courses for Kids
Free study material
Offline Centres
More
Store Icon
Store
seo-qna
SearchIcon
banner

What is electric power? Write the essential formula for it.

Answer
VerifiedVerified
428.1k+ views
like imagedislike image
Hint: In electricity, when current flows in the wire and provides electric current due to movement of electrons and hence developing potential difference across two points in electric circuits, then the work done by these moving charges is known as electrical energy consumed in an electric circuit.

Complete step by step answer:
Let us first understand the definition of electric power. Electric power is defined as the rate of electrical energy consumed each second or Electric power simply is the ratio of electrical energy and time for which that amount of electrical energy is consumed.

Since, energy is measured in the units of Joules and time is measured in units of seconds so, Power will be written mathematically as P=Et which will have the units of Joulesec1 and it’s denoted by 1Joulesec1=1Watt .
The other most common formulas of power in terms of current resistance and potential difference are written as
P=I2R Where I is the current flowing in the wire having resistance of R. The units of power, may be written here as A2Ω
P=V2R
Where V is the potential difference between two points and has a resistance of R.
The most general Units of power in large electrical circuits such as the electricity which is supplied at homes are used as kW kilowatts and MW Megawatts.

Note: It should be remembered that, the other two formulas of power are simple derived from the basic formula of power which is P=V×I and by ohm’s law we know V=RI and the units of conversions of power areas 1kW=103Watts and 1MW=106Watts.
Latest Vedantu courses for you
Grade 11 Science PCM | CBSE | SCHOOL | English
CBSE (2025-26)
calendar iconAcademic year 2025-26
language iconENGLISH
book iconUnlimited access till final school exam
tick
School Full course for CBSE students
PhysicsPhysics
ChemistryChemistry
MathsMaths
₹41,848 per year
Select and buy