Signals and Systems - ECE Questions and Answers

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Which one of following is correct condition to check the stability of sysytem in terms of impulse response?

Σ(x(n)) < ∞

Σx(n) < 0

Σx(n) = 0

Σx(n) = ∞

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A dice is tossed. The probability that either 1 or 2 will appear is

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which of the following is not true for impulse function δ(t)?

δ(t) = 0 for r ≠ 0

δ(t) is undefined for t = 0

Laplace transform is

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In the given figure the phase angle of Fn is either 0 or Π.

True

False

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The signal m(t) = 10 cos 100 pt is sampled at the rate of F_s = 75 H_z, then determine signal after sampling.

4 cos 100 pt + 8 sin 200 pt

4 cos 100 pt + 8 sin 200 pt + cos 75 pt

4 cos 25 pt + 8 sin 50 pt + cos 75 pt

none

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The tree selected for the formation of state equations contains

all voltage sources

all capacitors

all inductors and current sources

all voltage sources and maximum number of capacitors