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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.
How can you get negative voltage?
Your question should read "How do you get a negative potential?", for the reasons explained below.The term, 'voltage', is another word for 'potential difference'. The terms 'positive' and 'negative', when applied to a potential difference or voltage indicates the sense (or direction) in which the potential difference or voltage is acting. For example, if a second voltage is acting in the same direction as another voltage then it is acting in the positive sense; if it is acting in the opposite direction then in is acting in the negative sense'.It's very important to understand that you cannot apply 'positive' and 'negative' is the sense of charge or polarity to potential difference or voltage. You can, however, apply these terms to 'potential'. Potential is relative, and always measured with respect to a given point (often, the earth). So a point can be, for example, +5 V or -5 V with respect to another point (usually earth or ground, but not necessarily).Never confuse 'potential' with 'potential difference' and remember that 'voltage' means potential difference notpotential.So, to obtain a negative potential, earth (ground) the positive terminal of the battery or d.c. supply. All potentials measured relative to earth are now negative. To obtain a positive potential, earth the negative terminal of the battery or d.c. supply instead. All potentials measured relative to earth are now positive.If you want to get a negative potential,Earth the positive terminal of the DC power sourceConnect a resistor in series with the negative terminal of the sourceAt the other end of the resistor you get a negative potential (the value's less than the value of the power supply)
What is the value of 8y0 on zero as a factor?
If that's y to the zero power, the value is 8.
Will a negative number to the fifth power be a positive or negative value?
The result will be a negative value.
Is it possible for power to have a negative value?
Yes, power can have a negative value when it represents a decrease in energy or influence.
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.
What is the value of 3 to the negative power of 2?
0.03 is the square power
Will a negative number to the fifth power be a positive or a negative value?
negative
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.
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.
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 of 5 to the -4Th power?
The value of 5 to the negative 4th power (5-4) is 0.0016
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.
Which is less negative or positive?
Negative has a lesser value. Negative means the numbers below zero. Positive means the numbers above zero.
