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 - 2

• question_answer1) A circular hole of diameter R is cut from a disc of mass M and radius R, -the circumference of the cut passes through the centre of the disc. The moment of inertia of the remaining portion of the disc about an axis perpendicular to the disc and passing through its centre is   JEE Main Online Paper (Held On 07 May 2012)
  A)
  \[\left( \frac{15}{32} \right)M{{R}^{2}}\]                              
  done clear
  B)
                         \[\left( \frac{1}{8} \right)M{{R}^{2}}\]
  done clear
  C)
                         \[\left( \frac{3}{8} \right)M{{R}^{2}}\]                   
  done clear
  D)
                         \[\left( \frac{13}{32} \right)M{{R}^{2}}\]
  done clear
  View Answer play_arrow

• question_answer2) A solid sphere having mass m and radius r rolls down an inclined plane. Then its kinetic energy is   JEE Main Online Paper (Held On 07 May 2012)
  A)
  \[\frac{5}{7}\]rotational and \[\frac{2}{7}\]translational
  done clear
  B)
                         \[\frac{2}{7}\]rotational and \[\frac{5}{7}\]translational
  done clear
  C)
                         \[\frac{2}{5}\]rotational and \[\frac{3}{5}\]translational
  done clear
  D)
                         \[\frac{1}{2}\]rotational and \[\frac{1}{2}\]translational
  done clear
  View Answer play_arrow