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Solid State Physics
Aluminium has three valence electrons per atom, an atomic weight of 0.02698 kg mol−1,
a density of 2700kgm-3, and a conductivity of 3.54× 107 W−1m−1. Calculate the relaxation
time in Aluminium.
a density of 2700kgm-3, and a conductivity of 3.54× 107 W−1m−1. Calculate the relaxation
time in Aluminium.
Solid State Physics
Show that for a square lattice in two dimensions the kinetic energy of a free electron at a
corner of the first Brillouin zone is higher than that of an electron at the midpoint of a
side face of the zone by a factor of 2.
corner of the first Brillouin zone is higher than that of an electron at the midpoint of a
side face of the zone by a factor of 2.
Solid State Physics
Calculate the intrinsic carrier concentration for GaAs at 300 K, given that,
* 0.56 ; * 0.068 and 1.42
mh = me me = me Eg = eV.
* 0.56 ; * 0.068 and 1.42
mh = me me = me Eg = eV.
Solid State Physics
Calculate the limiting value of the magnetic field for which Nb will act as a
superconductor at 4 K. Take Bac(0) as 1970 Oe and Tc for Nb to be 9.25 K.
superconductor at 4 K. Take Bac(0) as 1970 Oe and Tc for Nb to be 9.25 K.
Solid State Physics
Explain the three types of defects in crystals.
Solid State Physics
What are transducers? Explain the working principle of a peizielectric transducer.
Solid State Physics
What are ferroelectric materials? Explain with the example of BaTiO3. How are they
different from piezoelectric materials?
different from piezoelectric materials?
Solid State Physics
With the help of a diagram, explain the working of a synchrocyclotron in your own
words.
words.
Solid State Physics
Using the semi-empirical mass formula for the binding energy of nuclei, calculate the
value of the atomic number (Z) for the most stable nucleus at a given mass number.
Calculate Z0 for A = 60. Take the values of g = 23.7 and d = 0.71 .
value of the atomic number (Z) for the most stable nucleus at a given mass number.
Calculate Z0 for A = 60. Take the values of g = 23.7 and d = 0.71 .
Solid State Physics
With the help of the binding energy curve for nuclei, explain main characteristics of
elements and the phenomenon of nuclear fusion and fission.
elements and the phenomenon of nuclear fusion and fission.
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