BARC-2018 EC: SIgnal & System Quiz 1
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Question 1
describe as system with an input x(t) and an output y(t). The system which is initially relaxed, is excited by a unit step input. The output y(t) can be represented by the waveformQuestion 2
A causal LTI system has zero initial conditions and impulses response h (t). Its input x (t) and output y (t) are related through the linear constant-coefficient differential equation 
Let another signal g(t) be defined as 
If G(s) is the Laplace transform of g(t), then the number of poles of G(s) is _______.
Question 3
In the figure, M(f) is the Fourier transform of the message signal.m(t) where A = 100 Hz and B = 40 Hz. Given
and
The cutoff frequencies of both the filters are fc 
The bandwidth of the signal at the output of the modulator (in Hz) is _____.
Question 4
Question 5
Consider a discrete time system whose impulse response 
is given as
with input 
is applied to the system. Then the magnitude of the response of the system for even values of n will be equal to _____________.
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