ECE :: Exam Questions Paper
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Px(X) = M exp(- 2 |x|) + N exp(- 3 |x|) is the probability density function for the real random variable X, over the entire x axis. M and N are both positive real numbers. The equation relating M and N is
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The electric field component of a time harmonic plane EM wave travelling in a non magnetic lossless dielectric medium has an amplitude of 1 V/m. If the relative permittivity of the medium is 4, the magnitude of the time-average power density vector (in W/m2) is
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The open loop transfer function of a unity feedback control system is given as
The phase cross over frequency and the gain margin are respectively. -
A unity negative feedback closed loop system has a plant with the transfer function
and a controller Gc(S) in the feed forward path. For a unit set input, the transfer function of the controller that gives minimum steady state error is -
In a J-K FF we have J = Q and K = 1. Assuming the FF was initially cleared and then clocked for 6 pulses, the sequence at the Q output will be
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The following sequence represents autocorrelation of a real valued signal. The energy of real valued sequence is given by __________ x(n) = {1, _, 3, _, 5, _, 7, _, 9, 10, _, 8, _, 6, _, 4, _, 2, _}
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The magnitude plot of a composite signal x(t) = e3jt + e4jt is __________ .
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Pxdx = 1
.
and 
and 
= 90°
.
.
...(i)
...(ii)
...(iv)
