Electric power formula class 10. We know that electric work done w v i t or p frac vit t p vi electric power in. Power formula connects the charge voltage and time. The power formula is used to compute the power resistance voltage or current in any electrical circuit.
Lets practice some problems to better understand the concept of electric power and its relation with voltage and current in a circuit. Different formulas for calculating power what is commercial unit of electric power it is measured in kilowatt hour kwh kilowatt hour 1 kilowatt hour 1000 watt 3600 second 1 kilowatt hour 3600000 watt second 1 kilowatt hour 36 10 6 watt seconds 1 kilowatt hour 36 10 6 joule questions. Learn power formula to solve problems in electric circuits.
Science class 10 physics. Derivation of formula for electric power. Anselectric power measure of the rate of electrical energy transfer by an electric circuit per unit time.
Write the si unit of electric power. Power is denoted as p and the si unit is watt. Write the electric power formula and explain the terms.
Here we have given ncert class 10 science notes chapter 12 electricity. The standard metric unit of power is the watt. Moreover it is a very important thing that allows us to see the rate at which electrical energy transfers from an electric circuit.
Similarly you will learn about the electric power formula in detail over here. Actually watt is a small unit therefore a bigger unit of electric power called kilowatt is used for commercial purposes. An electric machine makes use of 300 j of energy to do work in 10s.
The si unit of electric power is watt. The electric power is given by p vi. This sheet of pdf consist of short notes formula important bullet points of science class 10th prepared by expert faculty members of entrancei for quick recap of the entire chapter electricity of class 10 science.
All formulas of electricity class 10 cbse ncert physics current electricity si units of various quantities. Cbse class 10 science notes chapter 12 electricity pdf free download is part of class 10 science notes for quick revision. Power is defined as work done in unit time or energy used in unit time.
Electric power is a widely used term in physics as you must be aware of. Also 1 kilowatt 1000 watts so the rate at which electric work is done or the rate at which electric energy is consumed is called electric power we will now derive formula for the calculation of electric power. Electric power formula this is the currently selected item.
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