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In a series RL circuit Et equals 120 volts R equals 30 ohms and XL equals 40 ohms what is the apparent power?
The apparent power (VA) is a quantity which applies to alternating current with a reactive component. It does not apply to DC and, with AC, the apparent power and real power are the same if there is only resistance present.
With AC, other than just resistance there can be capacitors or inductors (coils) present. Perfect examples of these types of components do not dissipate power but do conduct current if AC voltage is applied.
In your example, the resistive component is 30 ohms while the reactive impedance is 40 ohms meaning the total impedance is 50 ohms (Pythagoras). You can't just add reactance and impedance. The current through the circuit will therefore be 2.4 amps (I=V/R OR 120/50).
The real or true power will be 172.8 watts ( I2 x R OR 2.42 x 30) while the apparent power will be 288 VA (2.42 x 50).
What else can I help you with?
What happens if you add more loads to a series circuit?
When you have multiple loads in a series, the resistance of the loads is added together allowing very little current to flow through the circuit to power any of the loads, making for a low amperage circuit. If you have your loads in parellel, the resistance of the loads in the circuit is subtracted which allows more current to flow, making for a high amperage circuit.
Is apparent power or real power the best measure of environmental impact of an AC electrical appliance?
Apparent power must be used for this is the total amount of power you need to generate. Apparent power includes all the loses of energy while real power is the power used by the electrical appliances. If you are talking about environmental impact then apparent power is the one you need because this is the overall power needed.
Megawatts equal how many kva?
A kVA is 1000 watts. Where k stands for kilo or 1000. V for volts A for amperes. A watt is a volt X a ampere. Mega means 1 000 000 so a megawatt= 1000 kVA. Note: This is only true for resistive loads like heaters and lightbulbs.AnswerYou cannot really ask 'How many watts equal how many volt amperes?', because you are describing two different quantities, as explained below:Alternating-current loads are often combinations of resistance and reactance (reactance is the opposition to current due to either inductance, or capacitance, or a combination of both).Loads having both resistance and reactance exhibit true power and reactive power.True power describes the rate at which energy is permanently lost due to the resulting temperature difference between the conductor(s) and the surroundings. True power is associated with purely resistive loads, and is expressed in watts.Reactive power describes the rate at which energy is alternately stored in a magnetic or electric field then returned to the supply. Reactive power is associated with purely reactive loads, and is expressed in reactive volt amperes.Apparent power is the vector sum of true power and reactive power, and is expressed in volt amperes.The relationship between true power and apparent power is:true power = apparent power x power factorPower factor varies from zero (purely reactive circuit) to unity (purely resistive circuit). So, true power (in watts) will only equal apparent power (in volt amperes) when the power factor is unity -i.e. in a purely resistive circuit. For all other types of circuit, the true power will always be less than the apparent power.
When a switch in an electrical circuit is turned off what will happen?
Closing a switch in an electrical circuit will complete the circuit. The supply voltage will then be applied to that circuit, and current will flow through that circuit.
Is wiring in your house a parallel or series circuit?
Houshold circuits, like all non-trivial circuits, are wired in series-parallel. Switches are in series with loads. Loads, and switches with loads as combined units, are in parallel with each other.
Why is the total power equals the sum of the individual values of power in a series circuit or a parallel circuit is used?
The total power equals the sum of the individual powers because power is the rate at which energy is supplied. Whether you have a series or parallel circuit, the total power comes from the power source.
What do you get when you divide true power in a circuit by the pararent power?
Power factor is truepower divide by apparent power.
A series circuit has 100mA flowing through a 1.5kohm load What is the power dissipated by the load?
A series circuit has 100mA flowing through a 1.5kohm load. The power dissipated by the load is equivalent to 15 Watt. This is based on the formula, power is equals to square current times load.
The power factor represents?
power factor=real power/apparent power... real power in the sense the capacity of the circuit for performing a work in a particular time..for example the work done by a motor circuit is so and so...real power is what we consume from them... apparent power if the product of the current thro' the circuit and the voltage...it will be always greater than the real power.. if the POWER FACTOR IS 1.0(100%),THEN THE AC POWER IN THE CIRCUIT WILL BE EQUIVALENT TO THE POWER OFFERED BY A DC CIRCUIT....
What is power factor of an R L series circuit?
Power factor in any circuit is the ratio of the load's true power to its apparent power. It's also the cosine of the phase angle. In L-R circuits, it's described as a 'lagging power factor', because the load current lags the supply voltage.
Under what condition will the power factor of a series R-L circuit approach unity?
When the Inductor's value equals Zero, then the Power Factor reaches 1. Conversly, when the Resistance equals 0, the Power Factor becomes Zero. The Power Factor for a Series R-L Circuit is equal to R / sqrt (R^2 + (w*L)^2 )
How do you find power in a series circuit?
Power dissipated by the entire series circuit = (voltage between its ends)2 / (sum of resistances of each component in the circuit). Power dissipated by one individual component in the series circuit = (current through the series circuit)2 x (resistance of the individual component).
The sum of all the power drops in a series circuit must equal?
The sum of all the power drops in a series circuit must equal
What is the reactive power if the RL series circuit has an apparent power of 230 VA and a true power of 180 watts?
In an RL series circuit, the reactive power (Q) can be calculated using the formula (Q = \sqrt{S^2 - P^2}), where (S) is the apparent power and (P) is the true power. Here, (S = 230 , VA) and (P = 180 , W). Substituting these values gives (Q = \sqrt{230^2 - 180^2} = \sqrt{52900 - 32400} = \sqrt{20500} \approx 143.3 , VAR). Thus, the reactive power is approximately 143.3 VAR.
What types of circuit load in which the apparent power is greater than real power?
Apparent power is VA. Real power is W reactive power is VAR. Under an inductive+resistive load the VA is higher than W
How many pathways exits for electricity travel on in a series circuit?
In a series circuit, there is only one path for electricity to travel along the circuit from the power source through each component connected in series back to the power source.
Name type of circuit load which the apparent power is greater than the active power?
these two types of circuit loads are the purely capacitive loads and purely inductive loadsAnother AnswerApparent power will be larger than true, or active, power in ANY circuit, other than a purely-resistive circuit or an R-L-C circuit at resonance.
