03 May 2011

Objective Type Questions

1) Davisson and Germer experiments relates to _____________

a) Interference   

b) Polarisation    

c)  Electron diffraction

d) Phosphorescence

2) Matter waves _________

a) are longitudinal

b) are electromagnetic

c) always travel with speed of light 

d) show diffraction

3) According to Schrodinger a particle is equivalent to a ___________

a) single wave

b) wave packet 

c) light wave 

d) cannot behave as wave

4) The traveling harmonic waves which have a constant magnitude at great distances and for which the normalization integral diverges represent ____________

a) free particles 

b) restrained waves

c) localized waves 

d) all the above

5) Which one of the following pairs of phenomena illustrates the particle aspect of wave particle duality?

a) Compton effect and Bragg's law 

b) Photoelectric effect and Compton effect 

c) Compton effect and Pauli's principle 

d) Bragg's law and photoelectric effect

6) The uncertainty relation holds for __________

a) microscopic particles only 

b) macroscopic particles only 

c) microscopic and macroscopic particles both 

d) neither microscopic nor macroscopic particles

7) The uncertainty relation cannot hold for the following pairs __________

a) position and momentum 

b) energy and time 

c) linear momentum and angle 

d) angular momentum and angle

8)  According to wave mechanics, a free particle can possess _________

a) Discrete energies 

b) Continuous energies 

c) Only one single value of energy 

d) None of these

9) In case of a potential step of height Vo. If a particle of energy E < Vo the transmittance is ________

a) zero

b) finite non-zero 

c) infinite 

d) 1

10) The ionization potential of hydrogen atom is 13.6 volt. The energy required to remove an electron from the second orbit of hydrogen is __________

a) 3.4 eV 

b) 6.8 eV 

c) 13.6 eV 

d) 27.2 eV