An ac wave with superimposed dc is symmetrical about x - axis.
Answer: B
It is not symmetrical about x - axis.
Enter details here
A voltage wave v = 10 + 20 sin ωt + 7.5 sin 3 ω(t) is applied to a series combination of two elements. The current is i = 5 sin (ωt + 20°) + 1.5 sin (3ωt + 10°). The elements are
Answer: A
DC component is absent in current and current is leading the voltage. Hence R and C.
Enter details here
State variables which describe a system are a unique set.
Answer: B
It is not a unique set.
Enter details here
In the state equation x = AX + Bu is a n x m matrix.
Answer: B
A is n x n matrix.
Enter details here
In the state equation x = AX + Bu is a n x m matrix.
Answer: B
A is n x n matrix.
Enter details here
An energy signal has G(f) = 10. Its energy density spectrum is
Answer: B
Energy density spectrum = |G(f)|2 = |10|2 = 100.
Enter details here
Fourier transform pair are
Answer: A
This is property of autocorrelation.
F[R1, 1 (t)] = s(f) where s(f) is Power spectral density.
Enter details here
Which one most appropriate dynamic system?
Answer: A
Because present output of y(n) depend upon past y(n - 1) and future y(n + 1).
Enter details here
An impulse function consist of
Answer: C
Because F.T. of δ(t) = 1, 1 is a Constant function ranging from -∞ to +∞.
Enter details here
Fourier transform pair are
Answer: A
This is property of autocorrelation.
F[R1, 1 (t)] = s(f) where s(f) is Power spectral density.
Enter details here