166. A particle is executing simple harmonic motion. Its total energy is proportional to its

1. 1. Displacement from equilibrium position

   
   
   

   2. Frequency of oscillation

   
   
   

   3. Square of amplitude of motion

   
   
   

   4. Velocity at equilibrium position

   
   
   

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   NA

   Correct Option: C

   NA

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167. The velocity of sound produced by a vibrating body varies

1. 1. Directly as the sq. root of density of the medium

   
   
   

   2. Inversely as the density of the medium

   
   
   

   3. Directly as the sq. root of frequency of the medium

   
   
   

   4. Inversely as the frequency of the medium

   
   
   

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   NA

   Correct Option: B

   NA

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168. Why is sound heard with more intensity through CO₂ than through the air ?

1. 1. Density of CO₂ is more than that of air

   
   
   

   2. Density of CO₂ is less than that of air

   
   
   

   3. Air is a bad conductor of heat

   
   
   

   4. CO₂ is a compound, but air is a mixture of gases

   
   
   

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   NA

   Correct Option: A

   NA

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169. If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity will

1. 1. Increase by a factor of 2

   
   
   

   2. Decreases by a factor of2

   
   
   

   3. Decrease by a factor of 4

   
   
   

   4. Remain unchanged

   
   
   

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   NA

   Correct Option: C

   NA

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170. With the propagation of a longitudinal wave through a material medium, the quantities transferred in the direction of propagation are

1. 1. Energy, momentum and mass

   
   
   

   2. Energy and momentum

   
   
   

   3. Energy and mass

   
   
   

   4. Energy

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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