A Guitar String of Length 105 Cm Is in Resonance

question 7

Multiple Choice

A guitar string of length 105 cm is in resonance with a tuning fork of frequency f.Using the fret board the length of the string is shortened by 1.5 cm while keeping the tension in the string constant.Now a beat frequency of 10 Hz is heard between the string and the tuning fork.What is the frequency of the tuning fork?

• A)230 Hz
• B)1380 Hz
• C)345 Hz
• D)690 Hz
• E)none of the above

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