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q explain linear versus nonlinear control systemslinear feedback control systems are idealized models that are conceived by the analyst for the sake
q determine the armature current and torque anglea 1500-hp 6600-v six-pole 60-hz three-phase wye-connected synchronous motor with a synchronous
consider the 220-v 1800-rmin dc motor controlled by a three-phase fully controlled rectifier from a 60-hz ac source the armature-circuit resistance
consider a 3-hp 220-v 1800-rmin separately excited dcmotor controlled by a single-phase fully controlled rectifierwith an ac source voltage of 230vat
q illustrate power semiconductor devicessince the advent of the first thyristor or silicon-controlled rectifier scr in 1957 tremendous advances have
q explain basic control systemselectric energy is widely used in practice because of the ease with which the system and device performance can be
digital transmission on fading multipath channelswe have discussed thus far digital modulation and demodulation methods for the transmission of
let both coherent ask and coherent psk systems transmit the same average energy per bit interval and operate on the same channel such that ebn0 18
q carrier modulation by digital signalsdigitally modulated signals with low-pass spectral characteristics can be transmitted directly through
q what do you mean by compandingin order to lower the crest factor of a waveform so as to produce better performance a process known as companding is
a symmetrical fluctuating message with ftmax 63 v and kcr 3 is to be encoded by using an encoder that employs an 8-bit natural binary code to
a uniform quantizer is said to have 16 levels and hence is called a midriser the saturation levels are to correspond to extreme values of the message
q describe about digital communication systemsfla digital signal can be deflned as having any one of a finite number of discrete amplitudes at any
q define wireless communicationsthe latest wireless communications technology is the personal satellite phone the coverage is planetary and one can
q advanced mobile phone systemcellular systems employed cells with a radius in the range of 5-18 km the base station usually transmitted at a power
q show television waveformthe television waveform representing one scan is illustrated in figure a blanking pulse with a duration of 018 of the
q explain television signal transmissiontelevision signals in television signal transmission are the electric signals generated by converting visual
comparison of analog-modulation systemsthe comparison of analog modulation systems conventional am dsb sc ssb sc vsb fm and pm can be based on three
q what do you mean by fm stereoit shows the block diagram of an fm stereo transmitter and an fm stereo receiver the following notation is
q explain the basic macroeconomic policy trilemma for open economiesanswer of three goals mainly countries share - independence in financial
q commercial fm radio broadcastingcommercial fm radio broadcasting utilizes the frequency band of 88 to 108 mhz for the transmission ofmusic and
q analog communication systemsan analog message is a continuum of possible amplitudes at any given time and analog signals are continuous in time and
from a source with pin 24 mw we want to get pout 60 mw at a distance l 20 km from the source alpha for the transmission line is given to be 23
qdeveloping countries could delay opening the capital account until the domestic financial system is strong enough to withstand the sometimes flow of