barcode printing using vb.net Inductance in Software

Print QR in Software Inductance

194 Inductance
QR Reader In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
QR Code 2d Barcode Encoder In None
Using Barcode generation for Software Control to generate, create QR Code image in Software applications.
10-10
Reading Denso QR Bar Code In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
Paint QR-Code In Visual C#
Using Barcode drawer for .NET framework Control to generate, create QR image in VS .NET applications.
Parallel-wire transmission line.
QR Code Printer In .NET
Using Barcode maker for ASP.NET Control to generate, create QR Code image in ASP.NET applications.
Printing QR In Visual Studio .NET
Using Barcode printer for Visual Studio .NET Control to generate, create Denso QR Bar Code image in .NET applications.
10-11
Painting Quick Response Code In VB.NET
Using Barcode encoder for .NET framework Control to generate, create Denso QR Bar Code image in .NET applications.
UPC Symbol Encoder In None
Using Barcode drawer for Software Control to generate, create UPC-A image in Software applications.
Coaxial transmission line.
EAN13 Encoder In None
Using Barcode printer for Software Control to generate, create UPC - 13 image in Software applications.
ECC200 Generation In None
Using Barcode printer for Software Control to generate, create ECC200 image in Software applications.
wavelength, in free space is just 75 cm, or a little more than 2 ft. In general, if f is the frequency in megahertz, then 1 4 wavelength (s) in free space, in centimeters, is given by s 7500/f
Create Barcode In None
Using Barcode maker for Software Control to generate, create barcode image in Software applications.
ANSI/AIM Code 128 Drawer In None
Using Barcode maker for Software Control to generate, create Code 128B image in Software applications.
The length of a quarter-wavelength section of transmission line is shortened from the free-space quarter wavelength by the effects of the dielectric. In practice, 1 4 wavelength along the line can be anywhere from about 0.66 of the free-space length (for coaxial lines with solid polyethylene dielectric) to about 0.95 of the free-space length (for parallel-wire line with spacers molded at intervals of several inches). The factor by which the wavelength is shortened is called the velocity factor of the line. This is because the shortening of the wavelength is a result of a slowing-down of the speed with which the radio signals move in the line, as compared with their speed in space (the speed of light). If the velocity factor of a line is given by v, then the above formula for the length of a quarter-wave line, in centimeters, becomes s 7500v/f
Leitcode Creator In None
Using Barcode encoder for Software Control to generate, create Leitcode image in Software applications.
EAN / UCC - 14 Drawer In Visual C#.NET
Using Barcode creation for VS .NET Control to generate, create EAN 128 image in .NET applications.
Very short lengths of line a few electrical degrees produce small values of inductance. As the length approaches 1 4 wavelength, the inductance increases. Transmission line inductors behave differently than coils in one important way: the inductance of a transmission-line section changes as the frequency changes. At first, the
Generate Barcode In None
Using Barcode encoder for Font Control to generate, create barcode image in Font applications.
Creating GS1 DataBar Truncated In .NET Framework
Using Barcode creator for Visual Studio .NET Control to generate, create GS1 RSS image in .NET framework applications.
Quiz 195 inductance will become larger as the frequency increases. At a certain limiting frequency, the inductance becomes infinite. Above that frequency, the line becomes capacitive instead. You ll learn about capacitance shortly. A detailed discussion of frequency, transmission line type and length, and inductance is beyond the level of this book. Texts on radio engineering are recommended for further information on this subject.
Bar Code Creator In Visual Studio .NET
Using Barcode generation for Reporting Service Control to generate, create bar code image in Reporting Service applications.
UPC-A Generation In Visual Basic .NET
Using Barcode creation for VS .NET Control to generate, create UPC A image in .NET applications.
Unwanted inductances
Generate Matrix 2D Barcode In Java
Using Barcode generation for Java Control to generate, create Matrix Barcode image in Java applications.
ECC200 Drawer In None
Using Barcode printer for Font Control to generate, create DataMatrix image in Font applications.
Any length of wire has some inductance. As with a transmission line, the inductance of a wire increases as the frequency increases. Wire inductance is therefore more significant at radio frequencies than at audio frequencies. In some cases, especially in radio communications equipment, the inductance of, and among, wires can become a major bugaboo. Circuits can oscillate when they should not. A receiver might respond to signals that it s not designed to intercept. A transmitter can send out signals on unauthorized and unintended frequencies. The frequency response of any circuit can be altered, degrading the performance of the equipment. Sometimes the effects of stray inductance are so small that they are not important; this might be the case in a stereo hi-fi set located at a distance from other electronic equipment. In some cases, stray inductance can cause life-threatening malfunctions. This might happen with certain medical devices. The most common way to minimize stray inductance is to use coaxial cables between and among sensitive circuits or components. The shield of the cable is connected to the common ground of the apparatus.
Quiz
Refer to the text in this chapter if necessary. A good score is 18 correct. Answers are in the back of the book. 1. An inductor works by: A. Charging a piece of wire. B. Storing energy as a magnetic field. C. Choking off high-frequency ac. D. Introducing resistance into a circuit. 2. Which of the following does not affect the inductance of a coil A. The diameter of the wire. B. The number of turns. C. The type of core material. D. The length of the coil. 3. In a small inductance: A. Energy is stored and released slowly.
196 Inductance B. The current flow is always large. C. The current flow is always small. D. Energy is stored and released quickly. 4. A ferromagnetic core is placed in an inductor mainly to: A. Increase the current carrying capacity. B. Increase the inductance. C. Limit the current. D. Reduce the inductance. 5. Inductors in series, assuming there is no mutual inductance, combine: A. Like resistors in parallel. B. Like resistors in series. C. Like batteries in series with opposite polarities. D. In a way unlike any other type of component. 6. Two inductors are connected in series, without mutual inductance. Their values are 33 mH and 55 mH. The net inductance of the combination is: A. 1.8 H. B. 22 mH. C. 88 mH. D. 21 mH. 7. If the same two inductors (33 mH and 55 mH) are connected in parallel without mutual inductance, the combination will have a value of: A. 1.8 H. B. 22 mH. C. 88 mH. D. 21 mH. 8. Three inductors are connected in series without mutual inductance. Their values are 4 nH, 140 H, and 5 H. For practical purposes, the net inductance will be very close to: A. 4 nH. B. 140 H. C. 5 H. D. None of these. 9. Suppose the three inductors mentioned above are connected in parallel without mutual inductance. The net inductance will be close to: A. 4 nH. B. 140 H.
Quiz 197 C. 5 H. D. None of these. 10. Two inductors, each of 100 H, are in series. The coefficient of coupling is 0.40. The net inductance, if the coil fields reinforce each other, is: A. 50 H. B. 120 H. C. 200 H. D. 280 H. 11. If the coil fields oppose in the foregoing series-connected arrangement, the net inductance is: A. 50 H. B. 120 H. C. 200 H. D. 280 H. 12. Two inductors, having values of 44 mH and 88 mH, are connected in series with a coefficient of coupling equal to 1.0 (maximum possible mutual inductance). If their fields reinforce, the net inductance (to two significant digits) is: A. 7.5 mH. B. 132 mH. C. 190 mH. D. 260 mH. 13. If the fields in the previous situation oppose, the net inductance will be: A. 7.5 mH. B. 132 mH. C. 190 mH. D. 260 mH. 14. With permeability tuning, moving the core further into a solenoidal coil: A. Increases the inductance. B. Reduces the inductance C. Has no effect on the inductance, but increases the current-carrying capacity of the coil. D. Raises the frequency. 15. A significant advantage, in some situations, of a toroidal coil over a solenoid is: A. The toroid is easier to wind. B. The solenoid cannot carry as much current. C. The toroid is easier to tune.
198 Inductance D. The magnetic flux in a toroid is practically all within the core. 16. A major feature of a pot-core winding is: A. High current capacity. B. Large inductance in small volume. C. Efficiency at very high frequencies. D. Ease of inductance adjustment. 17. As an inductor core material, air: A. Has excellent efficiency. B. Has high permeability. C. Allows large inductance in a small volume. D. Has permeability that can vary over a wide range. 18. At a frequency of 400 Hz, the most likely form for an inductor would be: A. Air-core. B. Solenoidal. C. Toroidal. D. Transmission-line. 19. At a frequency of 95 MHz, the best form for an inductor would be: A. Air-core. B. Pot core. C. Either of the above. D. Neither of the above. 20. A transmission-line inductor made from coaxial cable, having velocity factor of 0.66, and working at 450 MHz, would be shorter than: A. 16.7 m. B. 11 m. C. 16.7 cm. D. 11 cm.
Copyright © OnBarcode.com . All rights reserved.