Q. If Laplace transform of f(t) is F(s), then £[tf(t)] =

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Q. The minimum sampling frequency in sample/sec. required to reconstruct the following signal from its samples without distortion would be

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Q. The function shown in the given Figure can be written as

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Q. In a network V(s) = Z(s) I(s) where V(s), Z(s) and I(s) are Laplace transforms of v(t), z(t) and i(t). The voltage v(t) is

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Q. As per normal distribution the probability of an error between limits a and b is

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Q. If F(jω) is the Fourier transform of f(t) then f(t) =

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Q. The Laplace transform of sin ωt is

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Q. If f(t) is an even function

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Q. The waveform shown in the given Figure can be written as

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Q. If a function f(t) is Laplace transformable, then

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Q. In the given figure shows a periodic triangular wave. The Fourier series will have

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Q. If x^k is one sided to the right

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Q. A discrete LTI system is non-casual if its impulse response is

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Q. If f(t) is an odd function

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Q. The inverse z-transform of X(z) is

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Q. The impulse response of the DT - LTI system is given below.
Check whether the system is

1. Stable
2. Casual
3.Dynamic

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Q. For the single rectangular pulse of the given figure:
F(jω) = [Ad sin (ωd/2)]/(ωd/2).

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Q. If p is the probability of success and q is the probability of failure, then the probability that there are r successes in n trails is

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Q. A signal m(t) with bandwidth 500 Hz is first multiplied by a signal g(t) where g(t) ids given by below equation. The resulting signal is then passed through on ideal low pass filter with bandwidth 1 kHz. The output of the low pass filter would me

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

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