Question:
For a sound wave propagating in a medium, increasing its frequency will increase its:
(a) wavelength
(b) speed
(c) number of compressions per second
(d) time period
Answer:
Verified
(c) number of compressions per second
Explanation: Frequency is defined as the number of oscillations (compressions and rarefactions) passing a point per unit time. So, increasing the frequency directly increases the number of compressions passing a point per second. The speed of sound depends only on the medium and remains constant, while the wavelength and time period are inversely related to frequency, so they decrease when frequency increases.
