A string fixed at both ends is vibrating in one of its harmonics.If we now increase only the frequency at which the string is vibrating,which of the following characteristics do we also increase? (There could be more than one correct choice. )
A)the speed of the traveling waves on the string
B)the period of the traveling waves on the string
C)the wavelength of the traveling waves on the string
D)the amplitude of the traveling waves on the string
E)none of the above

Question

Quizplus · Accepted Answer

The speed of the traveling waves on a string fixed at both ends is determined by the tension in the string and its mass per unit length, not by the frequency. The period is the inverse of frequency, so increasing frequency decreases the period, not increases it. The wavelength in a given harmonic is determined by the length of the string and the number of antinodes, and does not directly change with frequency alone. The amplitude of the traveling waves is determined by the energy put into the system, not directly by the frequency.

A String Fixed at Both Ends Is Vibrating in One