A vibrating string of certain length l under a tension T resonates with a mode

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 per second 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

Options

(a) 344
(b) 336
(c) 117.3
(d) 109.3

Correct Answer:

344

Explanation:

No explanation available. Be the first to write the explanation for this question by commenting below.

admin:

Related Questions

  1. A particle is executing a simple harmonic motion. Its maximum acceleration
  2. A long straight wire carrying current of 30A is placed in an external uniform
  3. The time by a photoelectron to come out after the photon strikes is approximately
  4. Two charges each equal to 2µ C are 0.5m apart. If both of them exist inside vacuum
  5. A wheel is rotating at 900 rpm about its axis.When the power is cut-off it