Question

The frequencies of three tuning forks A, B and C have a relation $ {{n}_{A}}>{{n}_{B}}>{{n}_{C,}} $ When the forks A and B are sounded together the number of beats produced is n1. When A and C are sounded together the number of beats produced is n2, then the number of beats produced when B and C are sounded together is

• A. $ {{n}_{1}}+{{n}_{2}} $
• B. $ \frac{{{n}_{1}}+{{n}_{2}}}{2} $
• C. $ {{n}_{2}}-{{n}_{1}} $
• D. $ {{n}_{1}}-{{n}_{2}} $

Answer 1

Answer: (C)

When A and B are sounded together the number of beats $ ={{n}_{1}} $ When A and C are sounded together the number of beats $ ={{n}_{2}} $ So, the number of beats produced when B and C are sounded together $ ={{n}_{2}}-{{n}_{1}} $