Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
Which of the following statements are correct about intensity of sound? (1) It depends only on amplitude of wave (2) It depends both an amplitude and frequency of wave (3) Its practical unit is phono (4) Its practical unit is decibalA) 1, 2 and 3 are correct
B) 1 and 2 are correct
C) 2 and 4 are correct
D) 1 and 3 are correct
Correct Answer: C
Solution :
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