Download Aptitude Crack
img not found img not found

Exam Questions Papers - Engineering

Q1:

A periodic rectangular signal, x(t) has the waveform shown in the given figure. Frequency of the fifth harmonic of its spectrum is __________

A 200 Hz

B 250 Hz

C 400 Hz

D 1250 Hz

ANS:D - 1250 Hz

The periodic time = 4 ms = 4 x 10-3 s ∴ The fundamental frequency ∴ Frequency of the 5th harmonic = 250 x 5 = 1250 Hz.