Q. If x1(t) = 2 sin πt + cos 4 πt and x2(t) = sin 5 πt + 3 sin 13 πt , then

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Q. An ac network has a power factor of 0.8 leading if the applied wave is of fundamental frequency. If the applied wave contains third and fifth harmonics, the overall power factor will be

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Q. Assertion (A): A sweep circuit operates by virtue of recurring transient phenomenon.

Reason (R): Transients are always undesirable.

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Q. Which one is a non-causal system?

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Q. A linear system is characterized by H(ω) = Be^(-2ω²) the system is physically

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Q. The current in a circuit with 10 Ω resistance is i = 3 + 4 sin (100 t + 45°) + 4 sin (300 t + 60°) A. The rms current and power dissipated are

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Q. Fourier transform pair are

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Q. A voltage wave is i = 100 sin (ωt). Its average value calculated over one half cycle is

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Q. An RLC series circuit has a variable inductance. The value of L for resonance conditions at fundamental frequency is 0.18 H. For resonance conditions at third harmonic frequency the value of inductance is

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Q. which of the following is not correct?

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Q. If function f(t) has an initial value f(0¯) at t = 0¯, the Laplace transform of d[f(t)]/dt is

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Q. If f(t) = - f(- t) satisfies Drichlet conditions, then f(t) can be expanded in Fourier series containing

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Q. Transfer function of a linear system is 200 e^(-j10ω) The system is a

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Q. which one is discrete time periodic signal?

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Q. Frequency domain of a periodic triangular function is a

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Q. A signal is sampled at Nyquist rate fs = 2f0. The function can be recovered from its samples only. If it is a

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Q. A voltage wave is v = 50 sin ωt. Its average value calculated over full one cycle is

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Q. If f1 (t) and f2 (f) are two functions of time and a and b are constants, then

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Q. The z transform of x(n) = ∪(n)

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Q. Fourier transform of f(t) =

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