Multiple choice

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

  1. zero Hz

  2. 0.75 kHz

  3. 0.5 kHz

  4. 0.25 kHz

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Here $f_m = 1500 \ samples/sec, \quad f_m = kHz$

The sampled frequency are 2.5 kHz, 0.5 kHz, Since LPF has cut-off frequency 800 Hz, then only output signal of frequency 0.5 kHz would pass through it