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Q. Commercial FM radio broadcasting?
Commercial FM radio broadcasting utilizes the frequency band of 88 to 108 MHz for the transmission ofmusic and voice signals. The carrier frequencies are separated by 200 kHz, and the peak frequency deviation is fixed at 75 kHz. Each station (out of the possible 100) broadcasts in a channel bandwidth of 200 kHz centered on the carrier. The FM system is capable of presenting higher quality audio to the user than AM because of the larger audio band allowed from 50 Hz to 15 kHz. Distortion at most stations is below 1%. Besides broadcast applications, FM is also used in satellite links, aircraft altimetry, radars, amateur radio, and various two-way radio applications. Because of the larger bandwidth (up to 20 times more than in AM), an FM system has more freedom from interference and better performance in noise than any AM station.
Explain the working of an npn transistor. Working of npn transistor: In an npn transistor is demonstrated in the figure. The emitter base junction is forward biased whereas
Common-base configuration: The common-base that is abbreviated as CB transistor configuration, which is as well termed as the 'grounded base' configuration, is displayed in
Consider the 220-V, 1800-r/min dc motor, controlled by a three-phase fully controlled rectifier from a 60-Hz ac source. The armature-circuit resistance and inductance are 1.5 and
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why very high resistance wire is used is field windind and low resistance wire is used in armature winding in DC shunt machine?
Q. Commercial FM radio broadcasting? Commercial FM radio broadcasting utilizes the frequency band of 88 to 108 MHz for the transmission ofmusic and voice signals. The carrier
Q. What do you understand by major systems of a telecommunication network? Explain in detail the subscriber loop systems. Ans: Major systems of any telecommunication netw
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