Question

The essential condition for the formation of beats is

• A. difference in frequencies of two sources should be $\ge 10$
• B. difference in frequencies of two sources should be $<10$
• C. difference in frequencies of two sources should be $>10$
• D. difference in frequencies of two sources should be $\le 10$

Answer 1

Answer: (D)

Correct answer is (d) difference in frequencies of two sources should be $\le 10$