Question

The number of beats per seconds is

• A. greater than the difference in amplitude
• B. greater than the difference in frequency
• C. lesser to the difference in amplitude
• D. equal to the difference in frequency

Answer 1

Answer: (D)

equal to the difference in frequency

Number of beats per second or beat frequency is defined as the difference in the two frequency.
Beat frequency $b=|f_1-f_2|$