Ultrasonic waves can be detected by …… (a) telephone (b) Hebb’s method (c) Kundt’s tube (d) Quincke’s tube

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1.	Ultrasonic waves can be detected by …… (a) telephone (b) Hebb’s method (c) Kundt’s tube (d) Quincke’s tube
Answer» Correct answer is (c) Kundt’s tube

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