When 1.5 A of current is passed through a zinc specimen under a magnetic field of 2.0 T, the Hall voltage is 4.45 µV The width of the specimen is 0.03mm. Calculate the carrier concentration.
If a current carrying conductor placed in a perpendicular magnetic field, a potential difference will generate in the conductor which is perpendicular to both magnetic field and current. This phenomenon is called Hall Effect.
In steady state condition, the magn etic
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For an intrinsic semiconductor with a band gap of 0.75eV, determine the position of the Fermi level at T=300 K if mh* = 6me *.
A metallic element has a density of 10.22 g cm−3 , an atomic weight of 95.94 amu
and an atomic radius of 0.136nm. Determine whether its lattice structure is bcc or
fcc.
The interaction energy between two atoms is given by 
where r
is the inter-atomic separation. Show that for the particles to be in equilibrium,
and show that in stable equilibrium the energy of attraction is
seven times the energy of repulsion.
Given that the maximum wavelength of the photon required to break up a Cooper pair in tin is 1.08 × 10−3m, calculate the energy gap.
Derive an expression for the bulk modulus of a cubic crystal.
Copper has a Debye temperature of 340 K and a Fermi temperature of 81000 K. At what temperature will the contribution of the vibrations of the crystal lattice (within the Debye theory) and that of the conduction electrons (within the free electron theory) to the specific heat become equal?
Show that an arbitrary reciprocal lattice vector →G = →ha1 + →ka2 + →la3
is perpendicular
to the family of planes denoted by (h,k,l) in the direct lattice space.