26. Photoelectric effect can be explained by assuming that light

1. 1. Is a form of transverse wave

   
   
   

   2. Is a form of longitudinal wave

   
   
   

   3. Can be polarised

   
   
   

   4. Consists of quanta

   
   
   

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   NA

   Correct Option: D

   NA

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27. Consider the following statements
    1. Atom bomb is based upon the principle of uncontrolled nuclear fusion
    2. Hydrogen bomb is based upon the principle of uncontrolled nuclear fission
    3. Nuclear reactor is based upon the principle of controlled nuclear fission
    Which of the statements given above is / are correct ?

1. 1. 3 only

   
   
   

   2. 1 and 2 only

   
   
   

   3. 2 and 3 only

   
   
   

   4. 1, 2 and 3

   
   
   

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   NA

   Correct Option: A

   NA

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28. Which of the following will deflect in electric field ?

1. 1. Y - rays

   
   
   

   2. X - rays

   
   
   

   3. Cathode rays

   
   
   

   4. Ultraviolet rays

   
   
   

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   NA

   Correct Option: C

   NA

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29. The wavelength of the matter waves is independent of

1. 1. Charge

   
   
   

   2. Momentum

   
   
   

   3. Velocity

   
   
   

   4. Mass

   
   
   

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   NA

   Correct Option: A

   NA

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30. The dual nature of light is exhibited by

1. 1. Diffraction and photoelectric effect

   
   
   

   2. Diffraction and reflection

   
   
   

   3. Refraction and interference

   
   
   

   4. Photoelectric effect

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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