electric power formula

The unit of voltage is Volt. There are three major types of electric power - active power, reactive power, and apparent power. Where q = total charge and I = current (ampere). What are the Types of Electric Power? V is the potential difference in the circuit 3. So, the electric potential is the work done when divided by charge. Pro, Vedantu Apparent Power: The apparent power is that which is not used very often or lies idle. General form: electric power = voltage difference x current. 2. Active Power: This type of electric power is also known as real power or actual power or true power. Q1. 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. One Watt is one Joule of work being done on an object per second. I is the electric current Electric power = P = W/t = 18000 Joule/120 seconds = 150 Watt, Therefore, Electric current (I) = P/V = 150 / 250 = 0.60 Ampere. Sorry!, This page is not available for now to bookmark. Here, P is the power, V or voltage is the potential difference in the circuit, and I is the electric current. Q1. R is the resistance in the circuit. SI unit of Power used is Watt. To calculate power, the most simple equation is work done divided by time. By Ohm's Law, V = IR, and so there are additional forms of the electric power formula for resistors. When we substitute (1) in (2), we understand that power is now the charge multiplied by the voltage divided by the time. From the standpoint of electric power, components in an electric circuit can be divided into two categories: We use this power in all kinds of gadgets and devices in the house. If you want to denote a larger unit of electric power, you can use kilowatt (equal to 1000 watts). P = VI. Q2. Q2. Resistors: P = electric power (W) V = voltage difference (V = J/C) Pro, Vedantu Example: How much Power needs to be used to lift a mass of 5Kg to a height of 8m in 10s. When you push or pull something through some distance, you do some work, and it is represented by Joule. In this case, time gets canceled from the numerator and denominator, to give us the final equation, which is : P = IV. Electric energy = electric power × time = P × t Thus the formula for electric energy is given by: Electric energy = P × t = V × I × t = I2 × R × t = V2t / R S.I unit of electric energy is joule (denoted by J), where 1joule = 1watt × 1 second = 1volt × 1ampere × 1second Power can also be written as. Alternately, electric power is defined as the rate at which electric energy is transferred across an electrical circuit per unit time. What is meant by electric power? Vedantu academic counsellor will be calling you shortly for your Online Counselling session. It is the power that is actually used in real life. 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. Ampere is represented by A and is the unit of electric current. 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). Power (P) = V I = I 2 R = V 2 R. Where V = Potential across a resistor. You can also use gigawatt and megawatt for larger units of electric power. In an electrical circuit. It is really transferred to the load, such as the induction motor or transformer or generator. However, electric energy is Electric power multiplied by time. What are Some Prerequisites to Know Before Studying Electric Power? Power is measured in units of Watts (W), where a Watt is equal to a Joule per second (1 W = 1 J/s). 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. P=V2/R or I2R. 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. However, the above is used mostly for mechanical power. The unit in which actual power is calculated in watts. Pro, CBSE Previous Year Question Paper for Class 10, CBSE Previous Year Question Paper for Class 12. When we calculate power, we simply take the work and the amount of time it takes for us to do the work. Energy can be delivered by a battery or a circuit element, for instance, a resistor which releases energy as heat. Power is commonly defined as the rate at which the work is done. 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.” Another critical concept to keep in mind is that of current, which is the rate of flow of charge. The energy used by the iron for 2 minutes is 18 kJ, at a voltage of 250 volts. Watt is represented as W. If you do 75 Watts of work per second, it means you do 75 joules of work every second. Electric power is versatile - it can be produced in generators in our houses and can be supplied to electric batteries used in devices. I = Current Passing through the resistor. Additionally, we know that current is the charge per second that passes through the circuit at any given point in time. 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. 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. We should remember that power is the potential difference multiplied by the current. Electric Energy = P x t = 2800 Joule/second x 1800second = 5040000 Joule. These can be obtained when we apply the Ohms law, which says that electric current is proportional to voltage and inversely proportional to resistance. T or Time = 30 minutes = 30 x 60 seconds = 1800 seconds, P = 2800 Volt Ampere = 2800 Watt = 2800 Joule/second. 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. A 280 V – 10 A electric lamp is used for 30 minutes. How large is the current in the iron? R = Resistance. It is measured in volt-ampere reactive (VAR). Watt is the unit for power. When this is done with respect to time and in an electrical circuit, it is known as electric power. Where V is the voltage, R is the resistance, and I is the electric current.

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