Q. The signal defined by the equations f(t) = 0 for t < 0, f(t) = E for 0 ≤ t ≤ a and f(t) = 0 for t > a is

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Q. Inverse Laplace transform of 2s+5 / (s²+5s+6) is

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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

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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?

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Q. Z transform is a non-linear operation.

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Q. Which one most appropriate dynamic system?

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

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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.

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

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Q. The Fourier series of an odd periodic function contains

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Q. An impulse function consist of

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

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

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Q. Which one is a linear system?

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Q. Which one is a causal system?

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

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

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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

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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

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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

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