Frequency domain of a periodic triangular function is a
Answer: D
Because F.T. of a Triangular function is square sampling function.
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The Fourier series of an odd periodic function contains
Answer: D
For an odd function f(- x) = - f(x) Hence, only sine terms.
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The impulse response of discrete time system is x[n] = (4)n ∪[3 - n], the system is
Answer: D
It is stable and it depend upon future value for - ve n so it is non causal.
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Frequency domain of a periodic triangular function is a
Answer: D
Because F.T. of a Triangular function is square sampling function.
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δ(t - b) is a pulse function.
Answer: B
It is an impulse function occuring at t = b.
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A first order system will never be able to give a __________ response
1.band stop
2.band pass
3.all pass
Choose the correct option
Answer: C
Because to design band pass or band stop, transfer function of must be second order.
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The analog signal m(t) is given below m(t) = 4 cos 100 pt + 8 sin 200 pt + cos 300 pt, the Nyquist sampling rate will be
Answer: C
m (t) = 4 cos 100 pt + 8 sin 200 pt + cos 300 pt
Nyquist sampling freq fs ≤ 2fm where fm is highest frequency component in given signal and highest fm in 3rd part
2pfmt = 300 pt
fm = 150 Hz
fs = 2 x 150 p 300 Hz
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The trignometric Fourier series of an even function of time does not have
Answer: C
An even function cannot have sine terms because for an even function f( - x) = f(x).
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Which one is a non-causal system?
Answer: A
Because in (a) if you put n = 1 then y(n) = x(2) which shows output depend upon future value.
While in (b), (c) input converted to Past or Present and past.
Note that n cannot be in fraction so for x(n/2) you will put n = 2, 4, ... etc. not 1, 3, 5 .... etc.
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A voltage wave having 5% fifth harmonic content is applied to a series RC circuit. The percentage fifth harmonic content in the current wave will be
Answer: B
IC = V(jωC).
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