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barcode in vb.net 2005 How much of the power is true in Software
How much of the power is true Read QR Code JIS X 0510 In None Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications. Make QR Code In None Using Barcode creation for Software Control to generate, create QR Code ISO/IEC18004 image in Software applications. The above simple formulas allow you to figure out, given the resistance, reactance, and VA power, how many watts are true or real power, and how many watts are imaginary or reactive power. This is important in radiofrequency (RF) equipment, because RF wattmeters will usually display VA power, and this reading is exaggerated when there is reactance in a circuit. QR Code Scanner In None Using Barcode recognizer for Software Control to read, scan read, scan image in Software applications. QR Code 2d Barcode Creation In Visual C# Using Barcode generation for .NET framework Control to generate, create QR Code JIS X 0510 image in VS .NET applications. 314 Power and resonance in ac circuits
Creating Denso QR Bar Code In .NET Framework Using Barcode creator for ASP.NET Control to generate, create QR Code JIS X 0510 image in ASP.NET applications. Creating QR Code In VS .NET Using Barcode maker for .NET framework Control to generate, create QR Code ISO/IEC18004 image in VS .NET applications. Problem 178 QR Code JIS X 0510 Drawer In Visual Basic .NET Using Barcode encoder for VS .NET Control to generate, create QR Code image in .NET applications. Print Code 128B In None Using Barcode maker for Software Control to generate, create Code 128 image in Software applications. A circuit has 50 of resistance and 30 of inductive reactance in series. A wattmeter shows 100 watts, representing the VA power. What is the true power First, calculate the power factor. You might use either the phaseangle method or the R/Z method. Suppose you use the phaseangle method, then, Phase angle arctan (X/R) arctan (30/50) 31 degrees The power factor is the cosine of the phase angle. Thus, PF Remember that PF watts. cos 31 0.86 86 percent Draw UCC  12 In None Using Barcode creator for Software Control to generate, create UPC A image in Software applications. Printing Barcode In None Using Barcode creator for Software Control to generate, create barcode image in Software applications. PT/PVA. This means that the true power, PT, is equal to 86
Painting Bar Code In None Using Barcode printer for Software Control to generate, create barcode image in Software applications. Data Matrix ECC200 Drawer In None Using Barcode drawer for Software Control to generate, create Data Matrix image in Software applications. Problem 179 Printing UPC E In None Using Barcode generator for Software Control to generate, create Universal Product Code version E image in Software applications. Code 3 Of 9 Recognizer In VS .NET Using Barcode scanner for .NET Control to read, scan read, scan image in Visual Studio .NET applications. A circuit has a resistance of 1,000 in parallel with a capacitance of 1000 pF. The frequency is 100 kHz. If a wattmeter reads a VA power of 88.0 watts, what is the true power This problem requires several steps in calculation. First, note that the components are in parallel. This means that you have to find the conductance and the capacitive susceptance, and then combine these to get the admittance. Convert the frequency to megahertz: f 100 kHz 0.100 MHz. Convert capacitance to microfarads: C 1000 pF 0.001000 F. From the previous chapter, use the equation for capacitive susceptance: BC 6.28fC 6.28 0.100 0.001000 0.000628 siemens UPC A Creation In VS .NET Using Barcode creator for ASP.NET Control to generate, create UPC Symbol image in ASP.NET applications. Bar Code Creator In Visual C#.NET Using Barcode creation for VS .NET Control to generate, create barcode image in VS .NET applications. The conductance of the resistor, G, is found by taking the reciprocal of the resistance, R: G 1/R 1/1000 0.001000 siemens Generate UPC  13 In Java Using Barcode generation for Java Control to generate, create EAN13 image in Java applications. Bar Code Generation In VB.NET Using Barcode generator for .NET framework Control to generate, create barcode image in VS .NET applications. Although you don t need to know the actual complex admittance vector to solve this problem, note in passing that it is G + jB 0.001000 + j0.000628 GS1 128 Creation In Visual C#.NET Using Barcode generation for .NET Control to generate, create UCC128 image in VS .NET applications. Generate ANSI/AIM Code 128 In ObjectiveC Using Barcode printer for iPad Control to generate, create Code 128 image in iPad applications. Now, use the formula for calculating the resistance and reactance of this circuit, in terms of the conductance and susceptance. First, find the resistance: R G/(G2 + B2) 0.001000/(0.0010002 + 0.0006282) 0.001000/0.000001394 717 Then, find the reactance: X B/(G2 + B2) 0.000628/0.000001394 451 Power transmission 315 Therefore, R 717 and X 451. Using the phaseangle method to solve this (the numbers are more manageable that way than they are with the R/Z method), calculate Phase angle arctan (X/R) arctan ( 451/717) arctan ( 0.629) 32.2 degrees Then the power factor is PF cos 32.2 0.846 84.6 percent PT/PVA. Therefore, the true power The VA power, PVA, is given as 88.0 watts, and PF is found this way: PT/PVA 0.846 PT/88.0 0.846 0.846 88.0 74.4 watts
This is a good example of a practical problem. Although there are several steps, each requiring careful calculation, none of the steps individually is very hard. It s just a matter of using the right equations in the right order, and plugging the numbers in. You do have to be somewhat careful in manipulating plus/minus signs, and also in placing decimal points. Power transmission
One of the most multifaceted, and important, problems facing engineers is power: transmission. Generators produce large voltages and currents at a power plant, say from turbines driven by falling water. The problem: getting the electricity from the plant to the homes, businesses, and other facilities that need it. This process involves the use of long wire transmission lines. Also needed are transformers to change the voltages to higher or lower values. A radio transmitter produces a highfrequency alternating current. The problem: getting the power to be radiated by the antenna, located some distance from the transmitter. This involves the use of a radiofrequency transmission line. The most common type is coaxial cable. Twowire line is also sometimes used. At ultrahigh and microwave frequencies, another kind of transmission line, known as a waveguide, is often employed. The overriding concern in any powertransmission system is minimizing the loss. Power wastage occurs almost entirely as heat in the line conductors and dielectric, and in objects near the line. Some loss can also take the form of unwanted electromagnetic radiation from a transmission line. In an ideal transmission line, all of the power is VA power; that is, it is in the form of an alternating current in the conductors and an alternating voltage between them. 316 Power and resonance in ac circuits It is undesirable to have power in a transmission line exist in the form of true power. This translates either into heat loss in the line, radiation loss, or both. The place for true power dissipation is in the load, such as electrical appliances or radio antennas. Any true power in a transmission line represents power that can t be used by the load, because it doesn t show up there. The rest of this chapter deals mainly with radio transmitting systems.

