In an experiment to investigate the laws of vibration of stretched strings by sonometer, all of the following factors affect the frequency of a tuning fork EXCEPT the

Explanation

Length of the prong: Shorter prongs generally result in higher frequencies, while longer prongs produce lower frequencies. * Mass attached to the prong: Adding mass to the prongs (e.g., with wax) will decrease the frequency of vibration. * Nature of the material of the tuning fork: The material's elasticity (Young's modulus) and density play a crucial role in determining how it vibrates and, consequently, its frequency.The force with which the tuning fork is struck (Option B) primarily affects the amplitude (loudness) of the sound produced, not its frequency. While extremely hard strikes might cause minor, temporary deviations, for practical purposes, the frequency remains largely independent of the striking force.