Question

Number of beats between $A$ and $B$ is $5$ and between $B$ and $C$ are $3$. Beat frequency between $A$ and $C$ may be

• A. 1
• B. 2
• C. 8
• D. None of these

Answer 1

Answer: (B)

Number of beats between $A$ and $B,n_1=5$
Number of beats between $B$ and $C,n_2=3$
Hence, number of beats between $A$ and $C$,
$n_3=n_1-n_2$
$=5-3$
$=2$