D 1 127 47 If the moment of inertia of His 4.31 x 10 kg m determine the bond length of HI and the rotational energy at quantum number ) 5 r= Ero (1) O 203 x 10 pm 3.06 x 10 -12 21 (22 O 7.74 x 10 -21 O 3.87 x 10

A hypothetical NH molecule makes a rotational-level transition from \= 3 to l = 1 and gives off a photon of wavelength 1.800 nm in doing SO. What is the separation between the two atoms in this molecule if we model them as point masses? The mass of hydrogen is kg. 1.67 * 10-2 kg, and the mass of nitrogen is 2.33 * 10 26 a) 6.52*10^{-13}m b) 5.69*10^{-13}m c) 5.70*10^{-14} m d) 5.69*10^{-12}m e) 5.62*10^{-13}m

An empirical interatomic pair potential for xenon atoms, in units of eV, and nm, and the lattice parameter of Xenon is equal to 0.630 nm. V(r) = 12.6 X 10-7 31.8 X 10-4 712 The calculated interatomic separation (nearest-neighbour) distance is: A. 0.2227 nm. B. 0.3536 nm C. 0.4455 nm D. 1.414 nm

Q2:- Germanium is doped with 6 x105 donor atoms per cm3 at T = 300 K. The dimensions of the Hall device are d 5 x 103 cm, W= 2 x 102 cm, and L= 10' cm. The current is Ix =350 µA, the applied voltage is Vx= 150 mV, and the magnetic flux density is B2= 500 gauss= 4 x102 tesla. Calculate: (a) the Hall voltage, (b) the Hall field, and (c) the carrier mobility

p9C.1 Familiarity with the magnitudes of overlap integrals is useful when con- sidering bonding abilities of atoms, and hydrogenic orbitals give an indication of their values. (a) The overlap integral between two hydrogenic 2s orbitals is 1 ( ZR ZR +. 2а, " 12 а, 1 + ZR 240 a, -ZR/Z0 S(2s, 2s)={1+ Plot this expression. (b) For what internuclear distance is S(2s,2s) = 0.50? (c) The side-by-side overlap of two 2p orbitals of atoms of atomic number Z is ZR 1 ( ZR ZR S(2p,2p) ={1+ 10 a, 2a, 120 a. Plot this expression. (d) Evaluate S(2s,2p) at the internuclear distance you calculated in part (b).

A hypothetical NH molecule makes a rotational-level transition from I= 3 to l = 1 and gives off a photon of wavelength 1.740 nm in doing so. What is the separation between the two atoms in this molecule if we model them as point masses? The mass of hydrogen is 1.67 * 1 kg, and the mass of nitrogen is 2.33 * 10-26 kg. 5.59*10^(-13) m O 5.62*10^(-13) m 5.59*10^(-11} m 5.59*10^(-12)m 6.59*10^(-13) m

Question: 3. We have a p+-n junction NA=1018 cm-³ uniformily doped on the p-side, and a parabolic doping profile on the n-side such that ND-NA= a(x)1/2 where a=1018 cm- 3.5 a) Find xn b) Find Emax, and E(x) c) Find Vb

Question Consider a germanium crystal. Calculate the number of the quantum states per cm and the energy levels per cm? in the valence band (VB) and the conduction band (CB). The mass density of the germanium crystal is 5.33 g/cm. i) 3.54x10 quantum states cm in each VB and CB i) 1.77x1023 quantum states cm in each VB and CB i) 8.85x102 quantum states cm in each VB and CB iv) 3.54x103 energy levels cm in each VB and CB v) 1.77x10 energy levels cm in each VB and CB vi) 8.85x10 energy levels cm in each VB and CB Please choose ene Cl, v NOi, iv e Cii, iv 4 Oi, v eONone of the above

A/The volume density of atoms for a simple cubic lattice is 3 x 1022 cm. Assume that the atoms are hard spheres with each atom touching its nearest neighbor. Determine the lattice constant and the radium of the atom and APF. 15 M B/A th 0 051 ig diff oli calt

(b) Describe the nature and origin of various forces existing between the atoms of a crystal. Explain the formation of a stable bond using the potential energy versus interatomic distance curve. Assume that the potential energy of two particles in the field of each other is given by U(R) = - R where A and B are constants. R9 (i) Show that the particles form a stable compound for R= R. = (9B/A)/8 (R, is equilibrium separation) i) Show that for stable configuration, the energy of attraction is nine times the energy of repulsion. 8A (iii) Show that the potential energy of the system under stable configuration is 9Re