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Q. Explain Cathode-ray tube?
While the CRT display is one of the oldest, it still remains one of the most popular display technologies. The raster-scanned display devices work similarly to commercial television sets, whereas graphics display devices use different technologies to achieve extremely high resolution. A CRT video signal has only two levels, with a 0 level causing a dark spot and a 1 level causing a bright spot. The appropriate combination of 1s and 0s displays data on a CRT screen, with each character displayed by dot-matrix displays, typically in 5 × 7or7 × 9 display fonts.
a. Describe why a three-phase induction motor rotates always with a speed less than the synchronous speed. b. State the principle of operation of a capacitor start single-phase
Q. An op amp has a finite gain of only 50, but is otherwise ideal. For the inverting-amplifier circuit of Figure, if R 2 = 20 k, what value of R 1 would be needed to give a gain
what is Zener diode ? give some uses of it .
Explain ferrites and its uses in high frequency devices. A group of magnetic alloys show the property of magnetisation that change, with percentage of various constituent atoms
What is the purpose of control word written to control register in 8255? The control words written to control register state an I/O function for every I.O port. The bit D7 of t
what is the working of thermal transducers?
A flyback converter is to be designed so that it operates in continuous "current" (flux) mode with a duty cycle of D = 0.45 when input voltage V s = 48 V, output voltage V o = 30
In an electron microscope, a beam of electrons is produced by a device called an electron gun. In the electron gun, electrons are 'boiled off' from a heated filament (which is the
Explain mechanisms of propagation of radio communication. Radio communication deals with electronic radiation of electromagnetic energy from one point to another through atmosp
Application of Microprocessors Microprocessor microcontroller based systems may be used in almost every filed of life and their applications are increasing day by day
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