(i) At 300 K temperature the probability of finding an electron below the Fermi energy level is (a) 0 (b) negative (c) greater than zero (d) 0 (ii) The Fermi energy level at absolute zero temperature is directly proportional to (a) VE (b) n (c) E? (d) n2/3 (iii) Boltzmann Tail can be depicted from (a) Mott Jones equation (iv) Suppose the width of an energy band is 10 eV and EFo is 2.5 eV, if the energy of the vacuum level is assumed to be zero, (b) Boltzmann statistics (c) Fermi Dirac Statistics (d) Free electron model the work function of the metal is therefore (a) -2.5 eV (b) 2.5 eV (c) 7.5 eV (d) 10 eV (v) If the value of relative permittivity is 5, what would be the ratio between Eloc and E? (c) 1.5 () 3 (vi) When the dielectric medium is inserted, the charge between two electrodes will be (b) 9 (d) 2.33 6. (a) unchanged (b) increased (c) decreased (d) none (vii) Which one of the following properties is required to get piezoelectricity in crystal? (a) Noncentrosymmetry (b) Center of symmetry (c) Polarizability (d) none (viii) At absolute zero temperature, all the energy levels above Fermi level are of electron. (b) partially full (ix) If ,= 0.5 - 0.5j for a dielectric material, the value of the loss tangent is (a) full (c) vacant (d) none () 0 (b) 0.53 (c) 1 (d) 0.5 (x) Local field experienced by a molecule depends on (a) free charge on the (b) arrangement of polarized (c) both a & b (d) none molecule around it plate