A Guitar String of Length 105 Cm Is in Resonance

question 14

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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