11. When a charged particle enters a uniform magnetic field. its kinetic energy

1. 1. Remains constant

   
   
   

   2. Increases

   
   
   

   3. Decreases

   
   
   

   4. Becomes zero

   
   
   

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   NA

   Correct Option: A

   NA

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12. The electric potential at the center of a charged conductor is

1. 1. Zero

   
   
   

   2. Twice that to the surface

   
   
   

   3. Same as on the surface

   
   
   

   4. None of the above

   
   
   

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   NA

   Correct Option: C

   NA

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13. At a point inside a charged conductor the

1. 1. Electric field is zero

   
   
   

   2. Electric field is constant

   
   
   

   3. Potential is constant

   
   
   

   4. (a) and (c) both

   
   
   

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   NA

   Correct Option: D

   NA

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14. Metals getting magnetized by orientation of atomic magnetic moments in external magnetic field are called

1. 1. Ferromagnetic

   
   
   

   2. Anti-magnetic

   
   
   

   3. Paramagnetic

   
   
   

   4. Diamagnetic

   
   
   

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   NA

   Correct Option: C

   NA

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15. The magnetic induction associated with currents flowing in a hollow copper tube will be

1. 1. Only inside

   
   
   

   2. only out side

   
   
   

   3. Both inside and outside

   
   
   

   4. Neither inside nor outside

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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