96. In photoelectric effect, the number of photo electrons emitted is proportional to

1. 1. Intensity of incident beam

   
   
   

   2. Frequency of incident beam

   
   
   

   3. Velocity of incident beam

   
   
   

   4. Work function of photo cathode

   
   
   

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   NA

   Correct Option: A

   NA

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97. Which is the incorrect statement of the following ?

1. 1. Photon is a particle with zero rest mass

   
   
   

   2. Photon is a particle with zero momentum

   
   
   

   3. Photon travels with velocity of light in vacuum

   
   
   

   4. Photon even feel the pull of gravity

   
   
   

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   NA

   Correct Option: B

   NA

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98. Atomic power plant works on the principle of

1. 1. Fission

   
   
   

   2. Fusion

   
   
   

   3. Thermal combustion

   
   
   

   4. Combined effect of all the three

   
   
   

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   NA

   Correct Option: A

   NA

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99. Alpha rays emitted from a radioactive substance are

1. 1. Negatively charged particles

   
   
   

   2. Hydrogen nuclear

   
   
   

   3. Helium nuclear

   
   
   

   4. None of the above

   
   
   

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   NA

   Correct Option: C

   NA

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100. Cathode rays are similar to visible light rays, in that

1. 1. They both can be deflected by electric and magnetic fields

   
   
   

   2. They both have a definite magnitude of wavelength

   
   
   

   3. They both can ionise the gas through which they pass

   
   
   

   4. They both can affect photographic plates

   
   
   

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   NA

   Correct Option: D

   NA

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