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) Which one of the following is the Boolean expression for NOR gate?     JEE Main  Online Paper (Held On 19  May  2012)
  A)
  \[Y=\overline{A+B}\]
  done clear
  B)
                         \[Y=\overline{A.B}\]
  done clear
  C)
                         \[Y=A.B\]                            
  done clear
  D)
                         \[Y=\overline{A}\]
  done clear
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• question_answer2) Given the electric field of a complete amplitude modulated wave as\[\overset{_{\to }}{\mathop{E}}\,=\hat{i}{{E}_{C}}\left( 1+\frac{{{E}_{m}}}{{{E}_{C}}}\cos {{\omega }_{m}}t \right)\cos {{\omega }_{C}}t.\] Where the subscript c stands for the carrier wave and m for the modulating signal. The frequencies present in the modulated wave are     JEE Main  Online Paper (Held On 19  May  2012)
  A)
  \[{{\omega }_{C}}\]and\[\sqrt{\omega _{c}^{2}+\omega _{m}^{2}}\]
  done clear
  B)
                         \[{{\omega }_{c}},{{\omega }_{c}}+{{\omega }_{m}}\] and\[{{\omega }_{c}}-{{\omega }_{m}}\]
  done clear
  C)
                         \[{{\omega }_{c}}\]and\[{{\omega }_{m}}\]                       
  done clear
  D)
                         \[{{\omega }_{c}}\]and\[\sqrt{{{\omega }_{c}}{{\omega }_{m}}}\]
  done clear
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