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

Q. The analog signal given below is sampled by 600 samples per second for m(t) = 3 sin 500 πt + 2 sin 700 πt, then folding frequency is

View solution

Q. If H(f) = y(t)/x(t), then for this to be true x(t) is

View solution

Q. The analog signal m(t) is given below m(t) = 4 cos 100 πt + 8 sin 200 πt + cos 300 πt, the Nyquist sampling rate will be

View solution

Q. The ROC of sequence in the Z.T. of sequence x[n] = aⁿ ∪ [n] is

View solution

Q. In Laplace transform, multiplication by e^(-at) in time domain becomes

View solution

Q. The F.T. of a conjugate symmetric function is always

View solution

Q. Which one is time invariant system?

View solution

Q. The Fourier series representation of a periodic current (2 + 6√2 cos ωt +√48 sin 2ωt) A. The effective value is

View solution

Q. If X(z) = z+z¯³ / z+z¯¹, then x(n) series has

View solution

Q. If f=0

View solution

Q. An ac circuit has an impedance of (2 - j 9) Ω for third harmonic. The impedance for fundamental is

View solution

Q. The ROC of sequence x[n] = (0.8)ⁿ ∪[n] + (0.4)ⁿ ∪[n]

View solution

Q. Pick the odd one

View solution

Q. Assertion (A): L[af1(t) + bf2(t)] = aF1(s) - bF2(s)

Reason (R): Initial value theroem enables us to find the value of f(t) at t = 0 directly from F(s)

View solution

Q. The Laplace transform of impulse δ(t) is

View solution