Electrical power formula

What is the correct formula for power? What are the electrical power formulas? The SI unit of power is the watt , one joule per second.

A battery can deliver energy, or a circuit element like a resistor can release energy as heat. For any circuit element, the power is equal to the voltage difference across the element multiplied by the current. You can check this by dividing 4watts by 1watts and seeing that the ratio between them is indeed 4. Common electrical units used in formulas and equations are: Volt - unit of electrical potential or motive force - potential is required to send one ampere of current through one ohm of resistance. Ohm - unit of resistance - one ohm is the resistance offered to the passage of one ampere when impelled by one volt. J = one unit of electricity consumed.

Most commonly used electrical formulas are formulas related to voltage, current, power , resistance etc. Volt is a unit of electrical potential or motive force – potential is required to send one ampere of current through one ohm of resistance. Z = Impedence (Resistance in AC circuits i.e. XL, XC and R known as Inductive reactance, capacitive reactance and resistance respectively). If there is AC, look also at the power factor PF = cos φ and φ = power factor angle (phase angle) between voltage and amperage.

The capacity to do work is termed as Energy. The Energy expended to do work in unit time is termed as Power. Energy can be delivered by a battery or a circuit element, for instance, a resistor which releases energy as heat. The electric power in watts associated with a complete electric circuit or a circuit component represents the rate at which energy is converted from the electrical energy of the moving charges to some other form, e. Here i discuss some of important electrical formulas.

I hope it can make your basic understanding about electrical calculation is clear. The Handbook contains a wide array of topics and each topic is written by an authority on the subject. The treat-ment throughout the Handbook is practical with very little emphasis on theory. Finally, electrical power is the product of voltage and current.

Electrical power can be time-varying. Find the electric power of an electrical circuit that consumes 1joules for seconds. P is the electric power in watt (W). V is the voltage in volts (V). I is the current in amps (A).

R is the resistance in ohms (Ω). The formulas are for single phase AC power. For phase AC power: When line to line voltage (V L-L) is used in the.

They move and collide to the particles of conductor and this transferred energy converted into heat energy. Power Formulas in DC, AC Single Phase and AC Three Phase Circuits. Back to basic, below are the simple Power formulas for Single Phase AC Circuit, Three Phase AC Circuits and DC Circuits. You can easily find electric power in watts by using the following power formulas in electric circuits.

KW is real consumed power turned into heat, and is the product of volts x current x power factor. KVA is apparent power, is always greater than or equal to KW and is the product of volts x amps phase, volts x amps x, √ phase. USE KVA for calculations unless load is resistive, (ie. unit heaters, furnaces) then KVA = KW. The Ohm Law formulas above show the relationship between Voltage, Amps, Watts, and Ohms.

P=Watts - The rate of energy conversion. If you know two of them, you can calculate the other two. R=Ohms - The electrical resistance. I=Amps - The amount of electricity passing through a point.

E=Volts - The potential electrical difference between two points. The letter “k” is used in the electrical trade to abbreviate the metric prefix “kilo,” which represents a value of 000. To convert a number which includes the “k” prefix to units, multiply the number preceding the “k” by 000. Generally, electrical power is dissipated in the form of Heat (heaters), Mechanical Work such as motors,. This is why watts are sometimes called volt-amps.

Circuit breakers usually have the amps written on their handles.