Q. 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

View solution

Q. A box has 4 white and 3 red balls. Two balls are taken out in succession. What is the probability that both are white?

View solution

Q. Z transform is a non-linear operation.

View solution

Q. Which one most appropriate dynamic system?

View solution

Q. An energy signal has G(f) = 10. Its energy density spectrum is

View solution

Q. In an ac circuit the fundamental component of current wave lags the corresponding voltage wave by 20°. The third harmonic component of current wave lags the corresponding voltage by an angle.

View solution

Q. A signal g(t) = A then g(t) is a

View solution

Q. The Fourier series of an odd periodic function contains

View solution

Q. An impulse function consist of

View solution

Q. As per time displacement theorem in Laplace transformation, displacement in the time domain by T becomes

View solution

Q. If transfer function of a system is H(z) = 6 + z¯¹ + z¯², then system is

View solution

Q. Which one is a linear system?

View solution

Q. Which one is a causal system?

View solution

Q. Double integration of a unit step function would lead to

View solution

Q. If (27s+97)/(s²+33s) is the Laplace transform of f(t) then f(0⁺) is

View solution

Q. A voltage V(t) is a Gaussian ergodic random process with a mean of zero and a variance of 4 volt². If it is measured by a dc meter. The reading will be

View solution

Q. A first order system will never be able to give a __________ response

1. band stop
2. band pass
3. all pass

Choose the correct option

View solution

Q. A signal m(t) is multiplied by a sinusoidal waveform of frequency fc such that

v(t)=m(t) cos 2πfct

If Fourier transform of m(t) is M(f), Fourier transform of v(t) will be

View solution

Q. A voltage wave having 5% fifth harmonic content is applied to a series RC circuit. The percentage fifth harmonic content in the current wave will be

View solution

Q. δ(t) is a

View solution