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 - 2

• question_answer1) The amount of heat produced in an electric circuit depends upon the current (t), resistance (R) and time (I). If the error made in the measurements of the above quantities are 2%, 1% and 1% respectively then the maximum possible error in the total heat produced will be     JEE Main  Online Paper (Held On 19  May  2012)
  A)
  1%                                         
  done clear
  B)
                         2%
  done clear
  C)
                         6%                                         
  done clear
  D)
                         3%
  done clear
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• question_answer2) N divisions on the main scale of a vernier caliper coincide with (N + 1) divisions of the vernier scale. If each division of main scale is 'a' units then the least count of the instrument is     JEE Main  Online Paper (Held On 19  May  2012)
  A)
  a                                             
  done clear
  B)
                         \[\frac{a}{N}\]  
  done clear
  C)
                         \[\frac{N}{N+1}\times a\]                           
  done clear
  D)
                         \[\frac{a}{N+1}\]
  done clear
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