Maharashtra State PSC Model Paper 4

Question : 75 of 100

Marks: +1, -0

Statement I: The Sound produced from a violin and loudspeaker of the same frequency are distinguishable because of the difference in the quality of the sound

Statement II: The intensity of sound increases with an increase in the amplitude of the sound wave

Both statements I & II are individually true and statement II is the correct explanation of statement I
Both statements I & II are individually true and statement II is not the correct explanation of statement I
Statement I is false but statement II is true
Statement I is true but statement II is false

Validate

Solution:

CONCEPT:

A sound is a form of energy that is produced due to the vibration of an object and travels in the form of a longitudinal wave through mediums
Sound waves are mechanical in nature
Timbre is the characteristics of sound which only depends on the material from which sound is produced
The intensity of a sound wave is the amount of energy received per unit area and is proportional to the square of the amplitude

⇒\I ∝ \A^{2}

Where I = Intensity, A = Amplitude

EXPLANATION :

Even the sound produced from violin and loudspeaker are of the same frequency and the timbre of each sound is different, Hence statement I is true
Statement II is correct, the intensity of the wave is directly proportional to square amplitude, Hence statement II is true
The statements I & II are individually true
But statement II is not the correct explanation of statement I
Hence, option 2 is the answer

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