Exercise: Signals And Systems

Questions for: Signals And Systems

The theoretical power of white noise is
A:
zero
B:
finite
C:
depend upon frequency of signal
D:
infninite
Answer: C
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If f(t) and F(jω) form a transform pair, then as per symmetry in Fourier transforms
A:
F(jt) ↔ 2pf (- ω)
B:
F(jt) ↔ pf (ω)
C:
D:
Answer: A
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Assertion (A): Standard deviation is the abscissa of a point of inflection on the probability curve.

Reason (R): The equation for probability curve is

A:
Both A and R are correct and R is correct explanation of A
B:
Both A and R are correct but R is not correct explanation of A
C:
A is true, R is false
D:
A is false, R is true
Answer: B
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Assertion (A): If

Reason (R): Displacement in time domain by T becomes multiplication by e-st in s domain.

A:
Both A and R are correct and R is correct explanation of A
B:
Both A and R are correct but R is not correct explanation of A
C:
A is true, R is false
D:
A is false, R is true
Answer: B
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In Laplace transforms s = σ + jω. Which of the following represents true natue of s. Select your answer using the given codes
  1. σ has a damping effect
  2. σ is responsible for convergence of integral f(t)e-st dt
  3. σ has a value less than zero
Codes:
A:
1, 2 and 3
B:
1 and 2
C:
2 and 3
D:
1 and 3
Answer: B
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