Two function g1(t) and g2(t) with correlation of 6 has average power of 4 and 5 respectively. The power of g1(t) + g2(t) is
Answer: B
Power of two correlated signal is P = P1 + P2 +2R1, 2(t).
Enter details here
Z transform is a non-linear operation.
Answer: B
Z transform is a linear operation.
Enter details here
The signal define by the equations u(t - a) = 0 for t < a and u(t - a) = 1 for t ≥ a is
Answer: B
u(t) is a unit step function u(t - a) is a unit step function shifted in time by a.
Enter details here
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.
Enter details here
A voltage wave is v = 50 sin ωt. Its average value calculated over full one cycle is
Answer: A
Average of sinusoid over full cycle is zero.
Enter details here
The analog signal given below is sampled by 600 samples per second for m(t) = 3 sin 500 pt + 2 sin 700 pt then folding frequency is
Answer: C
NO Explanation.
Enter details here
Double integration of a unit step function would lead to
Answer: B
No explanation.
Enter details here
Fourier transform of f(t) =
Answer: A
It is differentiational Property of F.T.
Enter details here
Pick the odd one
Answer: D
Because Variance, standard Deviation, Expectation are related to each other.
Enter details here