Signal and systems miscellaneous

Signal and systems miscellaneous

Easy Questions
Moderate Questions
Difficult Questions

Signals and Systems

Signal and systems miscellaneous
  1. The derivative of an ideal step function is—








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    The derivative of an ideal step function is an impulse function.

    Correct Option: A

    The derivative of an ideal step function is an impulse function.

  1. A trigonometric series has—








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    NA

    Correct Option: A

    NA

  1. A signum function is—








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    Signum function may be defined as

    and step unit step function is defined as

    and step unit step function is defined as

    From fig. (A) and fig. (B), we conclude that
    sgn(t)=2u(t) – 1
    Hence, alternative (D) is correct choice.

    Correct Option: D

    Signum function may be defined as

    and step unit step function is defined as

    and step unit step function is defined as

    From fig. (A) and fig. (B), we conclude that
    sgn(t)=2u(t) – 1
    Hence, alternative (D) is correct choice.

  1. A sine wave generator starts at t = 0. It consists of—








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    A sine wave enter or start at t = 0, consists of a sine wave plus other frequencies.

    Correct Option: D

    A sine wave enter or start at t = 0, consists of a sine wave plus other frequencies.

  1. The spectral density of white noise—








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    Spectral density of a white noise is constant.

    Correct Option: D

    Spectral density of a white noise is constant.