Q. The function (sin x)/x

View solution

Q. Which of the following represents a stable system?

1. Impulse response decreases exponentially.
2. Area within the impulse response in finite.
3. Eigen values of the system are positive and real.
4. Roots of the characteristic equation of the system are real and positive.

Select the answer using the following codes:

View solution

Q. Auto correlation for τ = 0 is equal to

View solution

Q. X and Y are two random variable and Z = X + Y. Let σ²x, σ²y and σ²z be variance of X, Y and Z. Then

View solution

Q. Assertion (A): The conditions under which it is possible to write Fourier series of a periodic function are called Drichlet conditions.

Reason (R): If f(t) = - f(- t), it is refereed to as odd symmetry.

View solution

Q. L[c1f1(t) + c2f2(t)] =

View solution

Q. If a linear time invartant system is exicited by a pure random signal like white noise, the output of the linear system will have which of the following properties?

View solution

Q. A signum function is

View solution

Q. FIR filter Passes __________ Phase.

View solution

Q. A trigonometric series has

View solution

Q. If a number of odd functions are added, the resultant sum is

View solution

Q. In what range should Re(s) remains so that Laplace transform of the function e^[(a + 2)t + 5] exists?

View solution

Q. Which one of the following rules determines the mapping of s-plane to z-plane?

View solution

Q. For the signum function sgn(t), F(jω) =

View solution

Q. If a sequence is causal then ROC is (where a is any number)

View solution

Q. If f1(t)<< F1(jω) and f2(t)↔ F2(jω), then [a1 f1(t) + a2f2(t)]↔

View solution

Q. The signal x(t) = A cos (ω₀t + φ) is

View solution

Q. The inverse Fourier transform of δ(t) is

View solution

Q. Which one of the following is the correct statement of the system characterized by the equation y(t) = ax(t) + b?

View solution

Q. The derivative of unit step function is

View solution