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) Following are expressions for four plane simple harmonic waves (i)\[{{y}_{1}}=A\cos 2\pi \left( {{n}_{1}}t+\frac{x}{{{\lambda }_{1}}} \right)\] (ii\[{{y}_{2}}=A\cos 2\pi \left( {{n}_{1}}t+\frac{x}{{{\lambda }_{1}}}+\pi  \right)\] (iii)\[{{y}_{3}}=A\cos 2\pi \left( {{n}_{1}}t+\frac{x}{{{\lambda }_{2}}} \right)\] (iv)\[{{y}_{4}}=A\cos 2\pi \left( {{n}_{2}}t-\frac{x}{{{\lambda }_{2}}} \right)\] The pairs of waves which will produce destructive interference and stationary waves respectively in a medium, are   JEE Main Online Paper (Held On 07 May 2012)
  A)
  (iii, iv), (i, ii)        
  done clear
  B)
                         (i, iii), (ii, iv)
  done clear
  C)
                         (i,iv),(ii,iii)           
  done clear
  D)
                         (i, ii), (iii, iv)
  done clear
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• question_answer2) This question has Statement land Statement 2. Of the four choices given after the Statements, choose the one that best describes the two Statements. Statement 1: In the resonance tube experiment, if the tuning fork is replaced by another identical turning fork but with its arm having been filled, the length of the air column should be increased to obtain resonance again. Statement 2: On filling the arms, the frequency of a tuning fork increases.   JEE Main Online Paper (Held On 07 May 2012)
  A)
  Statement 1 is true. Statement 2 is true, Statement 2 is a correct explanation of Statement 1.
  done clear
  B)
                         Statement 1 is true, Statement 2 is false.
  done clear
  C)
                         Statement 1 is false, Statement 2 is true.
  done clear
  D)
                         Statement 1 is true, Statement 2 is true, Statement 2 is not a correct explanation of Statement 1.
  done clear
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