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In a Kundt's tube experiment, a metallic rod of length 1 m is clamped at 25 cm from one end. The distance between consecutive heaps of lycopodium powder in the tube is 50 cm. If the speed of sound in air is 330 m/s, which of the following statements is/are correct?

1. The frequency at which the tube is oscillating is 1320 Hz
2. The frequency at which the tube is oscillating is 330 Hz
3. The velocity of sound waves in the metallic rod is 330 m/s
4. The velocity of sound waves in the metallic rod is 1320 m/s

Correct answer: The frequency at which the tube is oscillating is 330 Hz

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