Solved papers for JEE Main & Advanced JEE Main Paper (Held On 19 May 2012)

done JEE Main Paper (Held On 19 May 2012) Total Questions - 1

• question_answer1) The decay constants of a radioactive substance for \[\alpha \] and \[\beta \] emission are \[{{\lambda }_{\alpha }}\]and \[{{\lambda }_{\beta }}\] respectively. If the substance emits \[\alpha \] and \[\beta \] simultaneously, then the average half life of the material will be     JEE Main  Online Paper (Held On 19  May  2012)
  A)
  \[\frac{2{{T}_{\alpha }}{{T}_{\beta }}}{{{T}_{\alpha }}+{{T}_{\beta }}}\]                  
  done clear
  B)
                         \[{{T}_{\alpha }}+{{T}_{\beta }}\]
  done clear
  C)
                         \[\frac{{{T}_{\alpha }}{{T}_{\beta }}}{{{T}_{\alpha }}+{{T}_{\beta }}}\]                    
  done clear
  D)
                         \[\frac{1}{2}\left( {{T}_{\alpha }}+{{T}_{\beta }} \right)\]
  done clear
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