Solution:
The fundamental frequency of an open organ pipe is . As temperature increases, both v and I increase but v increases more rapidly than I. Hence, the fundamental frequency increases as the temperature increases.
Assertion :The fundamental frequency of an open organ pipe increases as the temperature is increased.
Reason: As the temperature increases, the velocity of sound increases more rapidly than length of the pipe.
The fundamental frequency of an open organ pipe is . As temperature increases, both v and I increase but v increases more rapidly than I. Hence, the fundamental frequency increases as the temperature increases.