Solved papers for JEE Main & Advanced JEE Main Solved Paper-2015

done JEE Main Solved Paper-2015 Total Questions - 1

• question_answer1) A train is moving on a straight track with speed \[20m{{s}^{-1}}.\]. It is blowing its whistle at the frequency of 1000 Hz. The percentage change in the frequency heard by a person standing near the track as the train passes him is (speed of sound \[=320m{{s}^{-1}}\] ) close to [JEE Main Solved Paper-2015 ]
  A)
  18%                                                       
  done clear
  B)
  24%                
  done clear
  C)
  6%                                                         
  done clear
  D)
  12%
  done clear
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