56. The maximum number of photo electrons released in photocell is independent of

1. 1. Nature of the cathode surface

   
   
   

   2. Frequency of incident ray

   
   
   

   3. Intensity of radiations incident on cathode surface

   
   
   

   4. None of the above

   
   
   

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   NA

   Correct Option: B

   NA

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57. The colour of the + ve column in a gas discharge tube depends on

1. 1. The type of glass used to construct the tube

   
   
   

   2. The gas in the tube

   
   
   

   3. The applied voltage

   
   
   

   4. The material of the cathode

   
   
   

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   NA

   Correct Option: B

   NA

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58. Which of the following is not the property of cathode rays ?

1. 1. At produces heating effect

   
   
   

   2. It does not deflect in electric field

   
   
   

   3. Its casts shadow

   
   
   

   4. It produces fluorescence

   
   
   

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   NA

   Correct Option: B

   NA

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59. Which of the particles has similar mass to that of the electron ?

1. 1. Proton

   
   
   

   2. Neutron

   
   
   

   3. Positron

   
   
   

   4. Neutrino

   
   
   

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   NA

   Correct Option: C

   NA

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60. Particles which can be added to the nucleus of an atom without changing its chemical properties are

1. 1. Electrons

   
   
   

   2. Protons

   
   
   

   3. Neutrons

   
   
   

   4. α-particles

   
   
   

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   NA

   Correct Option: C

   NA

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