How many natural frequencies below are produced by an air column in a pipe of length…

PHYSICS · Single correct · CBSE · Physics · Waves · Waves

Problem

How many natural frequencies below

1\,\text{kHz}

are produced by an air column in a pipe of length

1\,\text{m}

closed at one end? Take the speed of sound in air as

340\,\text{m s}^{-1}

. (1) 3 (2) 6 (3) 4 (4) 8