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Question

Consider the following statement:
(a) Sound waves are longitudinal in nature.
(b) Sound waves cannot travel through vacuum.
(c) Sound waves are produced by oscillating charged particles only.
(d) Sound waves are electromagnetic waves.
Which of the following statements are correct ?

A
(a) and (b)
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B
(b) and (c)
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C
(a), (b) and (d)
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D
(a),(b),(c) and (d)
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Solution

The correct option is A (a) and (b)
Sound waves are longitudinal waves. It needs a medium to propagate. Sound waves are example of mechanical waves, not electromagnetic waves. Electromagnetic waves are created by the vibration of an electric charge.
Hence (a) and (b) are correct.

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