(i) Loudness of sound is directly proportional to the square of amplitude vibrations. |
(ii) Sound can travel through vacuum. |
(iii) Speed of sound is maximum in solids. |
(iv) The outer part of ear is called ear canal. |
A) (i) and (ii)
B) (ii) and (iii)
C) (i) and (iii)
D) (i) and (iv)
E) None of these
Correct Answer: C
Solution :
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