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  1. A 1 kHz sinusoidal signal is ideally sampled at 1500 samples/sec and the sampled signal is passed through an ideal low pass filter with cut off frequency 800 Hz. The output signal has the frequency.

    2. A.
    0 Hz
    B.
    0.75 kHz
    C.
    0.5 kHz
    D.
    0.25 kHz

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    Answer : Option C

    Explanation :

    Given fs = 1500 Hz ⇒ fm = 750 Hz.

    The given signal frequency is 1 kHz.

    The sampled frequency is 2.5 kHz, 0.5 kHz, But cut off frequency is 800 Hz or 0.8 kHz.

    Therefore only 0.5 kHz will pass.

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