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Question

Identify the correct statements :
(i) A material medium is necessary for the propagation of sound from one place to another.
(ii) The medium must have inertia.
(iii) The medium must be inelastic.
(iv) The medium must be frictionless.
(a) (i) and (ii)
(b) (i), (ii) and (iii)
(c) (i), (ii) and (iv)
(d) (ii), (iii) and (iv)

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Answer

(c) (i), (ii) and (iv)

Reason — A material medium is necessary for the propagation of sound from one place to another.

Requisites of the medium are :

  1. The medium must be elastic.
  2. The medium must have inertia.
  3. The medium must be frictionless.

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