0
Electric power is a measure of energy per unit of time.
For example: 1 volt=1 joule (energy)/ 1 coulomb (electric charge)
1 ampere=1 coulomb/1 second
1 watt=1 joule/1 second
In a direct current circuit, P (watts)=V (volts) x I (amps)
For direct current:
P=VxI
P=I^2R
P=V^2/R
Where R is resistance (ohms).
For alternating current:
S=P+jQ
S=VI* (I* means complex conjugate of I)
S=sqrt(P^2+Q^2)
V=IxZ
Z=R+jX
So P is the real part of S and Q is the imaginary part of S.
S is in unit of volt-amperes, P is in watts and Q is in vars (volt-ampere reactive).
X is reactance and is calculated by either jwL or 1/jwC or both depending on what components are in the circuit.
w is 2xpixfrequency of the AC circuit. L is inductance and C is capacitance.
CommentThere is no such thing as 'electrical power'. Power is simply a rate -it is neither electrical, mechanical, or anything else!
What else can I help you with?
What is the formula for phase angle?
Phase angle is defined as the angle by which the load current leads or lags the supply voltage in an AC circuit. There are numerous ways to calculate a circuit's phase angle, so there is no 'formula' as such. For example, if you know a load's resistance and impedance, or its true power and apparent power, then you can use basic trigonometry to calculate the phase angle, and so on.
What point in an electrical circuit that is connected to the negative side of a power supply is called what?
battery
What term best describes an electrical circuit in which no current flows from the power source through the control component load and conductors?
A cold circuit
What provides energy to circuit?
One possibility for what affects the voltage, is how many light bulbs, motors etc you have in the circuit causing the energy ( voltage ) to be shared.
What is the primary side of a circuit breaker?
The primary side of a circuit breaker refers to the input side where electrical power enters the breaker from the supply source. This side is connected to the electrical distribution system, allowing it to monitor and control the flow of electricity. The circuit breaker protects the circuit by interrupting the flow of current in case of overloads or short circuits, ensuring safety and preventing damage to the electrical system.
What is the formula to calculate the instantaneous power in an electrical circuit?
The formula to calculate the instantaneous power in an electrical circuit is P V x I, where P represents power, V represents voltage, and I represents current.
What is the i squared r formula used for in electrical engineering?
The i squared r formula is used in electrical engineering to calculate the power dissipated as heat in a circuit due to the resistance of the components and the current flowing through them.
What do you multiply to get electrical energy?
Electrical energy = (power) multiplied by (time) or (voltage across a component or circuit) times (current through it) times (time)
What is the relationship between power (P), current (i), and resistance (r) in an electrical circuit?
The relationship between power (P), current (i), and resistance (r) in an electrical circuit is described by the formula P i2 r. This means that power is directly proportional to the square of the current and the resistance in the circuit.
What is the only thing that can use power in an electrical circuit?
The load that is connected to the circuit is what draws the power of the electrical circuit.
How many amps in 6kW on a 240 volt supply?
To calculate the amperage in a circuit with a power of 6kW on a 240-volt supply, you can use the formula: Amperage (A) = Power (W) / Voltage (V). In this case, the amperage would be 25A. This calculation is based on the relationship between power, voltage, and current in an electrical circuit, as defined by Ohm's Law.
What is the formula for energy in an electrical circuit?
That really depends what information you have. One formula that is often used is: P = IV (power = current x voltage) Actually you should also multiply a power factor, but this power factor is one for DC, and it is often close to one for AC. From there, you can calculate energy (power x time).
Does the neutral wire have power in an electrical circuit?
No, the neutral wire does not carry power in an electrical circuit. It is used to complete the circuit and provide a return path for the current.
What is the equation to calculate power when circuit current and resistance are known what is the equation?
The power ( P ) in an electrical circuit can be calculated using Ohm's Law, which relates voltage ( V ), current ( I ), and resistance ( R ). The equation is given by ( P = I^2 R ), where ( P ) is the power in watts, ( I ) is the current in amperes, and ( R ) is the resistance in ohms. This formula shows that power is directly proportional to the square of the current multiplied by the resistance.
What does current do in an electrical circuit?
Current is the flow of electric charge in an electrical circuit, carrying energy from a power source to the components in the circuit.
Where does an electrical circuit end?
power source
What is the formula for phase angle?
Phase angle is defined as the angle by which the load current leads or lags the supply voltage in an AC circuit. There are numerous ways to calculate a circuit's phase angle, so there is no 'formula' as such. For example, if you know a load's resistance and impedance, or its true power and apparent power, then you can use basic trigonometry to calculate the phase angle, and so on.
