Solved papers for JEE Main & Advanced AIEEE Solved Paper-2012

done AIEEE Solved Paper-2012 Total Questions - 2

• question_answer1) A coil is suspended in a uniform magnetic field, with the plane of the coil parallel to the magnetic lines of force. When a current is passed through the coil it starts oscillating; it is very difficult to stop. But if an aluminium plate is placed near to the coil, it stops. This is due to :   AIEEE  Solved  Paper-2012
  A)
   developement of air current when the plate is placed.
  done clear
  B)
  induction of electrical charge on the plate
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  C)
  shielding of magnetic lines of force as aluminium is a paramagnetic material.
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  D)
  Electromagnetic induction in the aluminium plate giving rise to electromagnetic damping.
  done clear
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• question_answer2) A charge Q is uniformly distributed over the surface of non-condcting disc of radius R. The disc rotates about an axis perpendicular to its plane and passing through its centre with an angular velocity\[\omega \]. As a result of this rotation a magnetic field of induction B is obtained at the centre of the disc. if we keep both the amount of charge placed on the disc and its angular velocity to be constant and vary the radius of the disc then the variation of the magnetic induction at the centre of the disc will be represented by the figure :   AIEEE  Solved  Paper-2012
  A)
            
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  B)
    
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  C)
             
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  D)
   
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