136. A noise level of 100 decibel would correspond to

1. 1. Just audible sound

   
   
   

   2. Ordinary conversation

   
   
   

   3. Sound from a noisy street

   
   
   

   4. Noise from a machine shop

   
   
   

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   NA

   Correct Option: D

   NA

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137. When a stone is dropped on the surface of still water, the waves produced are

1. 1. Transverse

   
   
   

   2. Longitudinal

   
   
   

   3. Stationary

   
   
   

   4. Partially longitudinal and partially transverse

   
   
   

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   NA

   Correct Option: D

   NA

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138. There is no net transfer of energy by the particles of the medium in

1. 1. Longitudinal waves

   
   
   

   2. Transverse waves

   
   
   

   3. Progressive waves

   
   
   

   4. Stationary waves

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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139. In a stationary wave along a string the strain is

1. 1. Zero at nodes

   
   
   

   2. Maximum of nodes

   
   
   

   3. Maximum at anti nodes

   
   
   

   4. Constant every where

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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140. In a stationary longitudinal wave, nodes are points of

1. 1. Maximum pressure

   
   
   

   2. Minimum pressure

   
   
   

   3. Minimum pressure variation

   
   
   

   4. Maximum pressure variation

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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