Class 11

17. Waves question bank (Physics)

Practice 351 free Class 11 Physics - 17. Waves questions with answers and step-by-step solutions.

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Q1.

The wavelength of a wave is \(990\) cm and that of other is \(100\) cm. speed of sound is \(396\) m/s. The number of beats heard is  

(A)
4
(B)
5
(C)
1
(D)
8
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Q2.

If the velocity of sound in air is \(336\) m/s. The maximum length of a closed pipe that would produce a just audible sound will be  

(A)
3.2 cm
(B)
4.2 m
(C)
4.2 cm
(D)
3.2 m
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