Solved papers for JEE Main & Advanced JEE Main Paper (Held on 7 May 2012)

done JEE Main Paper (Held on 7 May 2012) Total Questions - 1

• question_answer1) A bar magnet of length 6 cm has a magnetic moment of \[4J\,{{T}^{-1}}.\]Find the strength of magnetic field at a distance of 200 cm from the centre of the magnet along its equatorial line.   JEE Main Online Paper (Held On 07 May 2012)
  A)
  \[4\times {{10}^{-8}}\text{tesla}\]                          
  done clear
  B)
                         \[3.5\times {{10}^{-8}}\text{tesla}\]
  done clear
  C)
                         \[5\times {{10}^{-8}}\text{tesla}\]          
  done clear
  D)
                         \[3\times {{10}^{-8}}\text{tesla}\]
  done clear
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