Signals and Systems - ECE Questions and Answers

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If , the terms in f(t) will have

e^-t and e^-2t

e^t and e^2t

te^-t and te^-2t

none of the above

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An impulse function consist of

pure dc

pure a.c

entire frequency range with constant phase

infinite bandwidth with linear phase vaariations

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As per time displacement theorem in Laplace transformation, displacement in the time domain by T becomes

division by s in the s domain

division by e^-sT in the s domain

multiplication by s in the s domain

multiplication by e^-sT in the s domain

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Which one is a causal system?

y(n) = 3x[n] - 2x[n - 1]

y(n) = 3x[n] + 2x[n + 1]

y(n) = 3x[n + 1] + 2x[n - 1]

y(n) = 3x[n + 1] 2x[n - 1] + x[n]

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Double integration of a unit step function would lead to

an impulse

a parabola

a ramp

a doublet

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If f(t) = A d(t - a), F(s) is

A e^-as

A e^as

A a e^-as

Aa e^as