Signals and Systems - ECE Questions and Answers

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Assertion (A): The Fourier series of the wave shown in the figure does not contain even harmaonics

Reason (R): If f(t) = - f(t ± T/2) the function is said to have half wave symmetry.

Both A and R are correct and R is correct explanation of A

Both A and R are correct but R is not correct explanation of A

A is true, R is false

A is false, R is true

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The following table gives some time functions and the Laplace transforms

Of these correctly matched pairs are

2 and 4

1 and 4

3 and 4

1 and 2

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If x_k = 2^k for k ≤ 0 and = 0 for k > 0 X(z) = 2/(2 - z).

True

False

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In plotting line spectrum

a graph of complex number F_n versus frequency is plotted

a graph of |F_n| versus frequency is plotted

a graph of the angle of F_n versus frequency is plotted

two graphs viz |F_n| versus frequency and the phase angle of Fn versus frequency are plotted

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The given figure shows a square wave i(t). Then I(s) =

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If the region of convergence of x₁(n) + x₂(n) is then the region of convergence of x₁[n] - x₂[n] includes

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Assertion (A): Transient periods are of short duration but can result in dangerously high voltages and currents.

Reason (R): Circuit equations in transient analysis are integral differential equations.

Both A and R are correct and R is correct explanation of A

Both A and R are correct but R is not correct explanation of A

A is true, R is false

A is false, R is true

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If f(t) ↔ F(jω), ↔

F(jω)

[F(jω)]ⁿ

(jω)ⁿ F(jω)

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The energy of highest value of Autocorrelation of a function 100 cos 50 pt is

200

zero