Solved papers for JEE Main & Advanced AIEEE Solved Paper-2004

done AIEEE Solved Paper-2004 Total Questions - 5

• question_answer1) A current\[i\]ampere flows along an infinitely long straight thin walled tube, then the magnetic induction at any point inside the tube is
  A)
  infinite          
  done clear
  B)
         zero                      
  done clear
  C)
         \[\frac{{{\mu }_{0}}}{4\pi }.\frac{2i}{r}T\]             
  done clear
  D)
         \[\frac{2i}{r}T\]
  done clear
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• question_answer2) A long wire carries a steady current. It is bent into a circle of one turn and the magnetic field at the centre of the coil is B. It is then bent into a circular loop of n turns. The magnetic field at the centre of the coil will be
  A)
  \[nB\]  
  done clear
  B)
                                         \[{{n}^{2}}B\]
  done clear
  C)
  \[2nB\]                
  done clear
  D)
         \[2{{n}^{2}}B\]
  done clear
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• question_answer3) The magnetic field due to a current carrying circular loop of radius 3 cm at a point on the axis at a distance of 4 cm from, the centre is 54\[\mu T\]. What will be its value at tile centre of the loop?
  A)
  \[250\mu T\]     
  done clear
  B)
         \[150\mu T\]     
  done clear
  C)
         \[125\mu T\]     
  done clear
  D)
         \[75\mu T\]
  done clear
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• question_answer4) Two long conductors, separated by a distance d. carry currents\[{{I}_{1}}\]and\[{{I}_{2}}\]in the same direction. They exert a force F on each other. Now, the current in one of them is increased to two times and its direction is reversed. The distance is also increased to 3d. The new value of the force between them is
  A)
  \[-2F\]
  done clear
  B)
                                         \[F/3\] 
  done clear
  C)
         \[-2F/3\]          
  done clear
  D)
         \[-F/3\]
  done clear
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• question_answer5) The materials suitable for making electromagnets should have
  A)
  high retentivity and high coercivity
  done clear
  B)
  low retentivity and low coercivity
  done clear
  C)
  high retentivity and low coercivity
  done clear
  D)
  low retentivity and high coercivity
  done clear
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