Solved papers for JEE Main & Advanced JEE Main Paper (Held On 12 May 2012)

done JEE Main Paper (Held On 12 May 2012) Total Questions - 1

• question_answer1) An insect crawls up a hemispherical surface very slowly. The coefficient of friction between the insect and the surface is 1/3. If the line joining the centre of the hemispherical surface to the insect makes an angle a with the vertical, the maximum possible value of a so that the insect does not slip is given by   JEE Main Online Paper (Held On 12 May 2012)
  A)
  \[\cot \alpha =3\]           
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  B)
                         \[\sec \alpha =3\]
  done clear
  C)
                         \[\cos ec\,\alpha =3\]                   
  done clear
  D)
                         \[\cos \,\alpha =3\]
  done clear
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