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Alternating Current and Voltage - Engineering

Q1:

A square wave has a period of 60 s. The first odd harmonic is

A 5 kHz

B 50 kHz

C 500 kHz

D 33.33 kHz

ANS:B - 50 kHz

Yes @Ruio.

6*(10^-6) , change 60us in hz.
f = 1/t=1/(60*10^-6) = (10^5)/6.
Then you will get 16666.66 Hz = 16.66 KHZ.
Now, For 1st odd harmonic = (3 * 16.66)KHZ = 50KHZ.