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Alternating Current and Voltage - Technical MCQs

Q1:

What is the fourth harmonic of a fundamental frequency of 400 Hz?

A 100 Hz

B 4 kHz

C 4 Hz

D 1.6 kHz

ANS:D - 1.6 kHz

The frequency of the nth harmonic (where n represents the harmonic # of any of the harmonics) is n times the frequency of the first harmonic..
Here the freq of 4th harmonic = 4*(fundamental freq)
=4*400
=1600 Hz = 1.6KHz