- Tardigrade
- Question
- Physics
- A vibrating string of certain length l under a tension T resonates with a mode corresponding to the first overtone (third harmonic) of an air column of length 75 cm inside a tube closed at one end. The string also generates 4 beats/s when excited along with a tuning fork of frequency n. Now when the tension of the string is slightly increased the number of beats reduces to 2 per second. Assuming the velocity of sound in air to be 340, m/s, the frequency n of the tuning fork in Hz is
Q. A vibrating string of certain length under a tension resonates with a mode corresponding to the first overtone (third harmonic) of an air column of length inside a tube closed at one end. The string also generates when excited along with a tuning fork of frequency . Now when the tension of the string is slightly increased the number of beats reduces to per second. Assuming the velocity of sound in air to be , the frequency of the tuning fork in is
Solution: