However, the above is used mostly for mechanical power. What is essential for you to know while studying electric power is the concept of power, which is the formula of work done by time. We should remember that power is the potential difference multiplied by the current. These can be obtained when we apply the Ohms law, which says that electric current is proportional to voltage and inversely proportional to resistance. When this is done with respect to time and in an electrical circuit, it is known as electric power. Vedantu academic counsellor will be calling you shortly for your Online Counselling session. When we calculate power, we simply take the work and the amount of time it takes for us to do the work. Q1.

How large is the current in the iron? It is generally denoted by the letter S with its SI unit as volt-amps or VA. Reactive Power: The power developed within the circuit reactance is known as reactive power (Q). Q2. The power consumed in an electric circuit is known as one Watt when one ampere of current is seen flowing through that electrical circuit. Electric power = P = W/t = 18000 Joule/120 seconds = 150 Watt, Therefore, Electric current (I) = P/V = 150 / 250 = 0.60 Ampere. In an electrical circuit.

There are three major types of electric power - active power, reactive power, and apparent power. Q2. If you want to denote a larger unit of electric power, you can use kilowatt (equal to 1000 watts). Where V is the voltage, R is the resistance, and I is the electric current. Electric power is versatile - it can be produced in generators in our houses and can be supplied to electric batteries used in devices. The unit in which actual power is calculated in watts. R is the resistance in the circuit. Learn the Power Formula We’ve seen the formula for determining the power in an electric circuit: by multiplying the voltage in “volts” by the current in “amps” we arrive at an answer in “watts.” Watt is represented as W. If you do 75 Watts of work per second, it means you do 75 joules of work every second. In this case, time gets canceled from the numerator and denominator, to give us the final equation, which is : Here, P is the power, V or voltage is the potential difference in the circuit, and I is the electric current. SI unit of Power used is Watt. Difference Between Electric Field and Magnetic Field, NCERT Solutions for Class 11 Physics Chapter 6, NCERT Solutions for Class 12 Physics Chapter 1, Electric Current and Its Effects NCERT Solutions - Class 7 Science, NCERT Solutions for Class 10 Science Chapter 13, Chemical Effects of Electric Current NCERT Solutions - Class 8 Science, NCERT Solutions for Class 11 Physics Chapter 6 Work, Energy and Power in Hindi, NCERT Solutions for Class 12 Physics Chapter 1 Electric Charges and Fields In Hindi, NCERT Solutions for Class 7 Science Chapter 14 Electric Current and Its Effects In Hindi, CBSE Class 7 Science Electric Current and Its Effects Worksheets, CBSE Class 8 Science Chemical Effects of Electric Current Worksheets, Important Questions for CBSE Class 11 Physics Chapter 6 - Work, Energy and Power, NCERT Books Free Download for Class 11 Physics Chapter 6 - Work, Energy and Power, Important Questions for CBSE Class 12 Physics Chapter 1 - Electric Charges and Fields, NCERT Books Free Download for Class 12 Physics Chapter 1 - Electric Charges and Fields, Important Questions for CBSE Class 8 Social Science Resources and Development Chapter 3 - Mineral and Power Resources, Important Questions for CBSE Class 7 Science Chapter 14 - Electric Current and Its Effects, Important Questions for CBSE Class 8 Science Chapter 14 - Chemical Effects of Electric Current, Important Questions for CBSE Class 10 Science Chapter 13 - Magnetic Effects of Electric Current, CBSE Class 11 Physics Work, Energy and Power Formulas, CBSE Class 12 Physics Electric Charges and Fields Formula, Class 11 Physics Revision Notes for Chapter 6 - Work, Energy and Power, Class 12 Physics Revision Notes for Chapter 1 - Electric Charges and Fields, CBSE Class 10 Science Revision Notes Chapter 13 - Magnetic Effects of Electric Current, CBSE Class 10 Science Revision Notes Chapter 14 - Sources of Energy, CBSE Class 7 Science Revision Notes Chapter 14 - Electric Current and Its Effects, CBSE Class 12 Physics Magnetism And Matter Formula, CBSE Class 8 Science Revision Notes Chapter 14 - Chemical Effects of Electric Current, CBSE Class 12 Physics Question Paper 2020, Previous Year Question Paper for CBSE Class 12 Physics, Previous Year Question Paper for CBSE Class 12 Physics - 2015, Previous Year Question Paper for CBSE Class 12 Physics - 2018, Previous Year Question Paper for CBSE Class 12 Physics - 2014, Previous Year Question Paper for CBSE Class 12 Physics - 2013, Previous Year Question Paper for CBSE Class 12 Physics - 2019, Physics Question Paper for CBSE Class 12 - 2016 Set 1 C, Previous Year Physics Question Paper for CBSE Class 12 - 2017, Vedantu

Voltage is the electromotive force or potential difference between two points, which signifies the amount of work required to move a charge between two points. Power is measured in units of Watts (W), where a Watt is equal to a Joule per second (1 W = 1 J/s). We use this power in all kinds of gadgets and devices in the house. General form: electric power = voltage difference x current.

Ampere is represented by A and is the unit of electric current. From the standpoint of electric power, components in an electric circuit can be divided into two categories: (Take g = 10m/s2) You can also use gigawatt and megawatt for larger units of electric power. However, electric energy is Electric power multiplied by time. R = Resistance. Electric Energy = P x t = 2800 Joule/second x 1800second = 5040000 Joule. Pro, Vedantu T or Time = 30 minutes = 30 x 60 seconds = 1800 seconds, P = 2800 Volt Ampere = 2800 Watt = 2800 Joule/second. What are the Types of Electric Power? By Ohm's Law, V = IR, and so there are additional forms of the electric power formula for resistors. P=V2/R or I2R. A 280 V – 10 A electric lamp is used for 30 minutes.

Power is commonly defined as the rate at which the work is done. It is the power that is actually used in real life.

It is the derived unit in the metric system.

I = Current Passing through the resistor. Alternately, electric power is defined as the rate at which electric energy is transferred across an electrical circuit per unit time. Power (P) = V I = I 2 R = V 2 R. Where V = Potential across a resistor. What are Some Prerequisites to Know Before Studying Electric Power? It is really transferred to the load, such as the induction motor or transformer or generator. In this case, the potential difference of 1 volt is applied across it. Active Power: This type of electric power is also known as real power or actual power or true power. Q1. It is measured in volt-ampere reactive (VAR). Power is actually the rate at which any work is done. I is the electric current For electric power, another equation used is when we calculate work through the amount of charge and the potential difference through which the charge is moving. In this case, time gets canceled from the numerator and denominator, to give us the final equation, which is : P = IV. Here, P is the power, V or voltage is the potential difference in the circuit, and I is the electric current. Sorry!, This page is not available for now to bookmark. The unit of voltage is Volt. Resistors: P = electric power (W) V = voltage difference (V = J/C)

How much energy does it require? It is the rate at which work is done or how fast some work is done. Electric power is transformed to other forms of energy when electric charges move through an electric potential (voltage) difference, which occurs in electrical components in electric circuits. What is meant by electric power? Electric Power Formula Electric power can be said to be the rate at which energy gets transported to or from a part of an electric circuit. Energy can be delivered by a battery or a circuit element, for instance, a resistor which releases energy as heat. Electric potential is the amount of work done in bringing a positive unit charge from infinity to a given point. When we substitute (1) in (2), we understand that power is now the charge multiplied by the voltage divided by the time. The formula for electric power is given by where, P is the power V is the potential difference in the circuit I is the electric current Power can also be written as The above two expressions are got by using Ohms law, Where, Voltage, current and resistance are related by the following relation Where, 1. Where q = total charge and I = current (ampere).

Pro, Vedantu Power can also be written as. One Watt is one Joule of work being done on an object per second. 2.

The energy used by the iron for 2 minutes is 18 kJ, at a voltage of 250 volts. It is defined as Joule per second.

Pro, CBSE Previous Year Question Paper for Class 10, CBSE Previous Year Question Paper for Class 12. Now, when we substitute (4) in (3), we understand that power is actually the current multiplied by time multiplied by voltage, divided by time.

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