Solved papers for JEE Main & Advanced JEE Main Paper (Held On 11 April 2015)

done JEE Main Paper (Held On 11 April 2015) Total Questions - 3

• question_answer1) A wire, of length L(=20 cm), is bent into a semi-circular arc. If the two equal halves, of the arc, were each to be uniformly charged with charges \[\pm Q.[|Q|={{10}^{3}}{{\varepsilon }_{0}}\]Coulomb where \[{{\varepsilon }_{0}}\]is the permittivity (in SI units) of free space] the net electric field at the centre 0 of the semi-circular arc would be : [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
  \[(50\times {{10}^{3}}N/C)\hat{J}\]
  done clear
  B)
  \[(25\times {{10}^{3}}N/C)\hat{i}\]
  done clear
  C)
  \[(25\times {{10}^{3}}N/C)\hat{j}\]
  done clear
  D)
  \[(50\times {{10}^{3}}N/C)\hat{i}\]
  done clear
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• question_answer2) An electric field \[\overset{\to }{\mathop{E}}\,=\left( 25\,\hat{i}+30\hat{j} \right)N{{C}^{-1}}\] exists in a region of space. If the potential at the origin is taken to be zero then the potential at x = 2 m, y = 2 m is : [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
   -130J
  done clear
  B)
   -12.0J
  done clear
  C)
   -140J
  done clear
  D)
   -110J
  done clear
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• question_answer3) In figure is shown a system of four capacitors connected across a 10 V battery. Charge that will flow from switch S when it is closed is: [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
  \[5\mu C\] from b to a
  done clear
  B)
  \[20\mu C\] from a to b
  done clear
  C)
  \[5\mu C\] from a to b
  done clear
  D)
   zero
  done clear
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