Which of the following actions will not cause an increase in the frequency of a vibrating string?
Answer Details
Increasing the cross-sectional area of the string will not cause an increase in the frequency of a vibrating string. This is because the frequency of a vibrating string is determined by its tension, mass per unit length, and length, but not by its cross-sectional area. Increasing the cross-sectional area of the string will only increase its volume and mass, but will not affect its tension or length, which are the factors that determine the frequency of the string. Therefore, this is the correct answer.