Solved papers for JEE Main & Advanced AIEEE Solved Paper-2008

done AIEEE Solved Paper-2008 Total Questions - 3

• question_answer1) Suppose an electron is attracted towards the origin by a force \[\frac{k}{r}\] where 'k' is a constant and 'r' is the distance of the electron from the origin. By applying Bohr model to this system, the radius of the \[{{n}^{th}}\] orbital of the electron is found to be \['{{r}_{n}}'\] and the kinetic energy of the electron to be \['{{T}_{n}}'\]. Then which of the following is true?       AIEEE  Solved  Paper-2007
  A)
  \[{{T}_{n}}\propto \frac{1}{n},\,{{r}_{n}}\propto n\]
  done clear
  B)
  \[{{T}_{n}}\propto \frac{1}{n},\,{{r}_{n}}\propto {{n}^{2}}\]
  done clear
  C)
  \[{{T}_{n}}\propto \frac{1}{{{n}^{2}}},\,{{r}_{n}}\propto {{n}^{2}}\]
  done clear
  D)
  \[{{T}_{n}}\] independent of \[n,\,{{r}_{n}}\propto n\]
  done clear
  View Answer play_arrow

• question_answer2) Directions: Questions No. 90 are based on the following paragraph. Wave property of electrons implies that they will show diffraction effects. Davisson and Germer demonstrated this by diffracting electrons from crystals. The law governing the diffraction from a crystal is obtained by requiring that electron waves reflected from the planes of atoms in a crystal interfere constructively (see figure).             Electrons accelerated by potential V are diffracted from a crystal. If \[d=1\overset{o}{\mathop{A}}\,\] and\[i={{30}^{o}}\], V should be about (\[h=6.6\times {{10}^{-34}}Js\],\[{{m}_{e}}=9.1\times {{10}^{-31}}kg,\,e=1.6\times {{10}^{-19}}C\])     AIEEE  Solved  Paper-2007  
  A)
  500 V    
  done clear
  B)
  1000 V  
  done clear
  C)
  2000 V  
  done clear
  D)
  50 V
  done clear
  View Answer play_arrow

• question_answer3) Directions: Questions No. 91 are based on the following paragraph. Wave property of electrons implies that they will show diffraction effects. Davisson and Germer demonstrated this by diffracting electrons from crystals. The law governing the diffraction from a crystal is obtained by requiring that electron waves reflected from the planes of atoms in a crystal interfere constructively (see figure).   If a strong diffraction peak is observed when electrons are incident at an angle 'I' from the normal to the crystal planes with distance 'd' between them (see figure), de Broglie wavelength \[{{\lambda }_{dB}}\] of electrons can be calculated by the relationship (n is an integer)     AIEEE  Solved  Paper-2007
  A)
  \[2\,d\sin i=n{{\lambda }_{dB}}\]            
  done clear
  B)
  \[d\cos i=n{{\lambda }_{dB}}\]
  done clear
  C)
  \[d\sin i=n{{\lambda }_{dB}}\]
  done clear
  D)
  \[2d\cos i=n{{\lambda }_{dB}}\]
  done clear
  View Answer play_arrow