Question

What is the frequency of a clock waveform if the period of that waveform is 1.25sec?

(a) 8 kHz

(b) 0.8 kHz

(c) 0.8 MHz

(d) 8 MHz

This question was posed to me by my college director while I was bunking the class.

Origin of the question is Fast Adder & Serial Adder topic in chapter Arithmetic Circuits of Digital Circuits

Answer 1

Right option is (c) 0.8 MHz

For explanation I would say: By using the formula of frequency, we can find the frequency of clock waveform. Time period(t) of the waveform is = 1.25microseconds

             f=1/t

             Where ‘t’ is the time taken by the clock waveform;

             f=(1/1.25)

             so, f=0.8 MHz.