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What types of circuit load in which the apparent power is greater than real power?
Wiki User
∙ 6y ago
Apparent power is VA. Real power is W reactive power is VAR. Under an inductive+resistive load the VA is higher than W
Wiki User
∙ 6y ago
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What are the different types of power dissipation?
static power dissipation dynamic power dissipation short circuit power dissipation
What are 2 types a circuits?
There are two types of circuits: series, and parallel. In a series circuit, electricity flows through all components of the circuit in a series. This means it flows from the power source, through all the components as a whole, then back to the source. A parallel circuit, on the other hand has the electricity flow through the components separately. Power flows from the source to each individual component individually, then back to the source. In a series circuit, if one component is missing or broken, the circuit will not function. With a parallel circuit, on the other hand, if a part is missing, or broken, all the other components will still work.
Which of the following are not types of home circuit?
It is hard to say when there is no "which of the following".
What are direct-current power supplies?
Dc Power Supplies converts AC to DC Two Main types 1)Linear : A simple circuit with diodes and capacitors 2)Switched Mode: sampling technique is used to convert AC to DC.
Types of electrical circuit?
Series and parallelImproved AnswerThere are four categories of circuit: series, parallel, series-parallel, and complex. 'Complex' is a 'catch-all', used to describe circuits that are not series, parallel, or series-parallel. An example of a 'complex' circuit is a Wheatstone Bridge circuit.
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.
Different types of power factor in different circuits?
The different types of power factor are: # Leading ( Due to Capacitive Circuit) # Lagging (Due to Inductive Circuit) # Unity (Due to Resistive Circuit)
What are 3 types of Electrification?
active power,reactive power and apparent power
What are the different types of power dissipation?
static power dissipation dynamic power dissipation short circuit power dissipation
How you find power of ac?
With a DC, we only have to consider the resistance of the load when we calculate power. However, with AC, we must also consider reactance (inductive reactance and/or capacitive reactance) when we calculate power. In fact, we need to consider three 'types' of power: true power, reactive power, and apparent power:True power describes the rate at which energy is dissipated by the resistive component of the circuit. This energy cannot be restored. We measure true power in watts.Reactive power describes the rate at which energy is temporarily stored in the magnetic field (inductive component) or electric field (capacitive component), and returned to the source when the field collapses. We measure reactive power in reactive volt amperes.Apparent power is the net rate of transfer of energy, and is the vector sum of true and reactive power. We measure apparent power in volt amperes.To find the true power of the circuit, you can use a wattmeter. To measure the apparent power of the circuit, it is simply the product of the supply voltage and load current. You will need to vectorially subtract the true power from the apparent power to determine the reactive power.A very important ratio used in AC power calcuations is (true power)/(apparent power), and this is called power factor -it corresponds to the cosine of the angle (phi) by which the load current lags or leads the supply voltage.Simple vector analysis will reveal that the true power = U I cos (phi)
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 are reciprocal circuit elements?
Reciprocal circuit elements are those elements/circuits in which power loss/gain is same at both nodes/ends.In these types of circuits we can check the circuit or connect it in any way.
What are the types of home circuit?
parallel circuit
What is two types of uninterruptible power supplies?
stand by: battery powered circuit is used when AC input fails inline device: battery powered circuit is used continually
What actually you understand the meaning of power factor?
In a.c. circuits, there are two different 'types' of 'power': 'true power' and 'reactive power'. 'True power' describes the rate at which the energy supplied to a load is either lost to the surroundings through heat transfer or which does useful work (such as providing the output from a motor), and we measure this in watts. 'Reactive power' describes the rate at which energy is alternately stored in the load's magnetic or electric fields and, then, returned to the supply as the current increases and decreases every quarter-cycle, and we measure this in reactive volt amperes. Some books describe reactive power as the rate at which this energy 'sloshes back and forth, between the supply and the load's magnetic or electric fields', because it represents the movement of energy but not a loss of that energy! For a given load, reactive power increases as the phase angle (the angle between the load current and the supply voltage) increases. Obviously, therefore, the greater a load's reactive power, the greater its apparent power. The 'total' rate at which energy is moving in an a.c. circuit is the vector sum of true power and reactive power, and we call this the circuit's 'apparent power', expressed in volt amperes. Power factor is simply the ratio between true power (expressed in watts) and apparent power (expressed in volt amperes) or the cosine of the phase angle. Loads with low power factors (i.e. large phase angles) draw far more current than is necessary for the energy consumed from the supply. So, low power-factor loads require unecessarily-large supply conductors if higher-than-normal voltage drops and line losses are to be avoided and are, therefore, undesirable.
What are all the types of circuits?
Series circuit Parallel circuit Tank circuit
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.
