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Meaning it's a capacitive load. Leading power factor
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What does unity power factor UPF mean?
Unity power factor has a value of 1.0. This means the current and voltage waveforms are in phase. This is only possible if the net load is non-reactive (resistive). If the load is either capacitively or inductively reactive, the power factor will be other than unity. If an inductively reactive load such as a motor is offset by a capacitively reactive load such as a PF correction capacitor, it is possible to acheive a net load that has unity power factor. Some loads, such as resistance heaters, are intrinsically non-reactive, and present a unity power factor.
Can modulation index be negative?
ya, it can be negative because as m=Vm/Vc , the value of Vm if taken in negative then modulation index can be naegative
Why the dc average voltage is having negative value?
Voltage is synonymous with 'potential difference', and cannot have a positive or negative value (in the sense of charge). So what you are describing is 'potential', which can. So, for example, a battery whose positive terminal is earthed or grounded will indicate a negative potential if a voltmeter is connected between earth and its negative terminal.
What is effect of power factor on the readings of wattmeter?
If you are asking whether power-factor improvement has any effect on a wattmeter reading, then the answer is no, it doesn't. Improving the power factor of a load has absolutely no effect on the power of the load, but it can act to reduce the value of the load current.
What is the difference between mva and mw?
For clarification, the correct symbols are 'MV.A' and 'MW' -where a capital 'M' represents 'mega'. A lower case 'm' stands for 'milli' -quite a difference. And the symbols for ampere and volt are an upper case A and an uppercase V.When an electric current flows through a load, the temperature of the load increases above ambient temperature, and energy is therefore lost to the surroundings through heat transfer. This represents a permanent loss of energy from the circuit. The rate at which this energy is lost is called the true power of the circuit, measured in watts.At the same time, whenever current flows, a magnetic field is set up around the conductor. As the current increases in value during the first quarter-cycle, this field expands and energy is stored within that field. During the next quarter-cycle, as the current reduces in value, the energy stored in the magnetic field is returned to the circuit. So, while there is movement of energy, there is no net loss of energy from the circuit. The rate at which this energy transfer is taking place is called the reactive power of the circuit, measured in reactive volt amperes. (A similar thing happens in capacitive circuits, although the energy is stored/returned in an electric, rather than in a magnetic, field).The vector sum of true power and reactive power is called the apparent power of the circuit, measured in volt amperes. That is:(Apparent Power)2 = (True Power)2+ (Reactive Power)2(Technically, there is absolutely no reason why true power, reactive power, and apparent power can't all be measured in watts -it is only traditional to use different units!)It is very easy to measure the apparent power of a circuit, because it is the product of the voltage applied to the load and the current flowing through it -and we could use a voltmeter and an ammeter to determine these values. It is rather more difficult to measure the true power because the voltage and the current must be multiplied by the load's power factor, which is not necessarily known. Nevertheless, it can be measured directly, using a wattmeter.
ELISA HIV test cut off value 0.614 and test value 0.394 test non reactive What does it mean?
A non-reactive means that HIV antibodies were not detected. A number below 1.0 is negative and above 1.0 is positive (or reactive). If the number is very close to 1.0 then a confirmatory test may be recommended by your doctor.
Will a negative number to the fifth power be a positive or negative value?
The result will be a negative value.
What is the value of 3 to the negative power of 2?
The value of 3 to the negative power of 2 is 1/9.
How the capacitor valve calculate for a for a load?
I assume that you are asking how to calculate the 'value' of a capacitor? Well, it depends what it is used for. If, for example, it is used to improve the power factor of a load, then it is first necessary to determine what the load's existing reactive power is; then, you need to know what reactive power is necessary with the power factor at its desired value; finally you need to difference between the actual and the desired values of reactive power -and this will be the necessary value for the capacitor. Power factor correction capacitors are rated in reactive volt amperes, not farads.
Will a negative number to the fifth power be a positive or a negative value?
negative
What does unity power factor UPF mean?
Unity power factor has a value of 1.0. This means the current and voltage waveforms are in phase. This is only possible if the net load is non-reactive (resistive). If the load is either capacitively or inductively reactive, the power factor will be other than unity. If an inductively reactive load such as a motor is offset by a capacitively reactive load such as a PF correction capacitor, it is possible to acheive a net load that has unity power factor. Some loads, such as resistance heaters, are intrinsically non-reactive, and present a unity power factor.
What is negative 2 with the power of 4?
its 16, because the value of the power is even so the negative has no effect.
Why reactive power is so confusing for engineers?
This is because reactive power concept is completely different from active(real) power,That is when we talk about active (real) power, we deal with two terms :The average value, and the instantaneous value.Both has significant values; let's say the average value is 5kw, where the instantaneous value maybe 2kw or 6kw, etc...On the otherhand, reactive power has always a Zero average value, and a different significant instantaneous values, but since the instantaneous value is difficult to measure, we always take the maximum instantaneous value of reactive power and deal with it as a textbook terminology (Reactive power) which is symbolized as Q and equals V I sintheta.And for the same reason (difficult to measure instantaneous value ) we easily deal with the average value of the active power other than the instantaneous value.As a brief:(Active power) symbolized P or known sometimes as real power equals V I cos thetarepresents the average value.(Reactive power) symbolized Q equals V I sin theta represents maximum instantaneous value.Someone can ask!Why not to take the maximum instantaneous value of average power such as reactive power as a terminology?Easily , why not to unites the two concepts ?!This is the answer of our main question (Why reactive power is so confusing for engineers?)This is easily because ,there is no useful meaning of using the instantaneous value for the active power, because it is a real produced power goes in one direction from source to load, where the average reactive power is always zero valued, since it goes back and forth in the network, and we are forced to deal with it in some way as an indication value and give it a unique terminology to express it as a fact that we cannot skip.In other words, you cannot compare two different things; apple and banana! Each one has a different taste.I hope that I answered the question, and dislodged some dust about this confusing concept, even I didn't take the boring mathematical path.
What is the value of 5 to the -4Th power?
The value of 5 to the negative 4th power (5-4) is 0.0016
What does a negative z value mean?
Negative z value means that the raw dat is below the mean, if z value is positive it means that the raw data is above the mean.
What is the value answer of 1x10 to the power of negative 5.3?
5.0119x10 to the power of -6 or 0.0000050119
Which is less negative or positive?
Negative has a lesser value. Negative means the numbers below zero. Positive means the numbers above zero.
