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P = E/t: This formula is also called the mechanical power equation. Here E stands for energy in joule and t stands for time in seconds. This formula states that the consumption of energy per unit of time is called power.
What are the 3 formulas for power?
Power = force multiplied by speed (velocity) P = F × v.ALTERNATING CURRENT (AC) ~ Current (single phase): I = P / V p ×cos φ Current (3 phases): I = P / √3 V l ×cos φ or I = P / 3 V p ×cos φ Power (single phase): P = V p ×I p ×cos φ Power (3 phases): P = √3 V l ×I l ×cos φ or P = √3 V p ×I p ×cos φ.
What is electric power formula?
The electric power in watts produced by an electric current I consisting of a charge of Q coulombs every t seconds passing through an electric potential (voltage) difference of V is P=QVt=IV P = QV t = IV , where Q is electric charge in coulombs, t is time in seconds, I is electric current in amperes, and V is electric.
What is right formula of power?
According to the power formula, a unit of power is equal to a unit of work divided by a unit of time. Also, a watt is equal to Joule/ second. Besides, due to historical reasons, power is occasionally used to describe the power delivered by a machine. In addition, one horsepower equals 750 Watt.
What is current formula?
The current is the ratio of the potential difference and the resistance. It is represented as (I). The current formula is given as I = V/R. The SI unit of current is Ampere (Amp).
How do you find power?
Power is equal to work divided by time. In this example, P = 9000 J /60 s = 150 W .
What is the SI unit of power?
watt Derived quantity Name Expression in terms of SI base units energy, work, quantity of heat joule m 2 ·kg·s – 2 power, radiant flux watt m 2 ·kg·s – 3 electric charge, quantity of electricity coulomb s·A electric potential difference, electromotive force volt m 2 ·kg·s – 3 ·A – 1.
What’s the work formula?
To express this concept mathematically, the work W is equal to the force f times the distance d, or W = fd. If the force is being exerted at an angle θ to the displacement, the work done is W = fd cos θ.
What is unit power?
Electricity is measured in units of power called Watts, named to honor James Watt, the inventor of the steam engine. A Watt is the unit of electrical power equal to one ampere under the pressure of one volt. One Watt is a small amount of power.
Which formula of power is used in series?
The total power in a series circuit is equal to the SUM of the power dissipated by the individual resistors. Total power (PT) is defined as: PT = P1 + P2 + P3 Pn. As an example: A series circuit is made up of three resistors with resistance values of 5 ohms, 10 ohms, and 15 ohms.
How do you use the power formula?
Excel POWER Function Summary. The Excel POWER function returns a number raised to a given power. The POWER function is an alternative to the exponent operator (^). Raise a number to a power. Number raised to power. =POWER (number, power) number – Number to raise to a power. power – Power to raise number to (the exponent).
What is Ohm’s law state?
Ohm’s law states that the current through a conductor is proportional to the voltage across the conductor. V=IR where V is the voltage across the conductor and I is the current flowing through it.
What is current explain?
Current is the rate at which electrons flow past a point in a complete electrical circuit. At its most basic, current = flow. It expresses the quantity of electrons (sometimes called “electrical charge”) flowing past a point in a circuit over a given time.
What are types of current?
There are two kinds of current electricity: direct current (DC) and alternating current (AC). With direct current, electrons move in one direction. Batteries produce direct current. In alternating current, electrons flow in both directions.
What does Q mean in physics?
The electric field strength (E) is defined as the amount of force exerted upon a test charge per unit of charge on the test charge (q). That is, E = F / q. A charge Q creates an electric field. A test charge q is used to measure the strength of the electric field at a distance d from Q.
How do you find true power?
Real power, measured in watts, defines the power consumed by the resistive part of a circuit. Then real power, (P) in an AC circuit is the same as power, P in a DC circuit. So just like DC circuits, it is always calculated as I2*R, where R is the total resistive component of the circuit.
How do you calculate total power?
Power can also be calculated using either P = IV or P=V2R P = V 2 R , where V is the voltage drop across the resistor (not the full voltage of the source). The same values will be obtained.
What is the difference between work and power?
Work is referred to as the process of energy that is transferred to an object’s motion by applying force. It is generally represented as the product of displacement and force. Power is the amount of energy that is transferred in a unit of time. The formula for calculating the force is Work = Force * Displacement.
What is full form of SI unit?
Système international.
What is SI unit of time?
second. The second, symbol s, is the SI unit of time. It is defined by taking the fixed numerical value of the cesium frequency ΔνCs, the unperturbed ground-state hyperfine transition frequency of the cesium 133 atom, to be 9 192 631 770 when expressed in the unit Hz, which is equal to s–1.
What is power example?
Power is defined as the ability to act or have influence over others. An example of power is the strength needed to run five miles. An example of power is the authority a local government has to collect taxes. The definition of power is operating electrically or having strength or force.
