ECE :: Exam Questions Paper
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The impulse response h(t) of a linear time-invariant continuous time system is described by h(t) = exp (at) u(t) + exp (βt) u (- t), where u(t) denotes the unit step function, and a and β are constants. This system is stable if
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An 8 level encoding scheme is used in a PCM system of 10 kHz channel BW. The channel capacity is
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For the power amplifier circuit shown below, the maximum power dissipated by both output transistor is
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For static electric and magnetic fields in an homogenous source-free medium, which of the following represents the correct form of Maxwell's equations?
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A periodic rectangular signal, x(t) has the waveform shown in the given figure. Frequency of the fifth harmonic of its spectrum is __________
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An antisymmetric filter having odd number of coefficient may have a performance as
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A material has conductivity of 105 mho/m and permeability of 4p x 10-7 H/m. The skin depth at 9 GHz is
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A fair coin is tossed independently four times. The probability of the event "the number of time heads shown up is more than the number of times tails shown up" is
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h(t) dt < ∞ 
= 1 
= 1 
.
.