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- Find a GaAs Hall element from web (specify Ic and VH).A metal has a density of 10.22 g/cm, atomic weight of 95.94 g/mole and atomic radius of 0.136 nm. Is it BCC or FCC? Justify your answer.The number of silicon atoms per m3 is 5 × 1028. This is doped simultaneously with 5 × 1022 atoms per m3 of Arsenic and 5 × 1020 per m3 atoms of Indium. Calculate the number of electrons and holes. Given that ni = 1.5 × 1016 m-3. Is the material n-type or p-type?
- Say that the surface of a star has a temperature of 6000 K and an electron density of n = 2.6 x 1019 electrons per m3. Using the Saha equation, what fraction of hydrogen atoms is ionized?A monatomic ion has a charge of +2. The nucleus of the ion has a mass number of 86. The number of neutrons in the nucleus is 1.26 times that of the number of protons. How many electrons and what is the element?: A uniform piece of n-type of silicon that is lum long senses a voltage of 1 v. Determine the velocity of the electrons. Use p1350 cm/V.ses
- Consider spherical nanoparticles of copper with diameters of 10 and 100 nm. A) Calculate the total number of atoms in the particles,considering the lattice parameter of bulk Cu. B) Calculate the number of atoms at the grain boundaries for a typical grain boundary thickness of 1nm.Suppose a capacitor consists of two coaxial thin cylindrical conductors. The inner cylinder of radius ra has a charge of +Q, while the outer cylinder of radius rh has charge -Q. srb The electric field E at a radial distance r from the central axis is given by the function: E = ge/d0 + B/r + bo where alpha (a)., beta (8), ao and bo are constants. Find an expression for its capacitance. First, let us derive the potential difference Voh between the two conductors. The potential difference is related to the electric field by: Edr = - Edr Calculating the antiderivative or indefinite integral, Vab = (-aageao + B + bo By definition, the capacitance Cis related to the charge and potential difference by: C = Evaluating with the upper and lower limits of integration for Vab, then simplifying: C = Q/( (e""b/ao - eTala0) + ß In ) + bo (The number of silicon atoms per m3 is 5 × 1028. This is doped simultaneously with 5 × 1022 atoms per m3 of Arsenic and 5 × 1020 per m3 atoms of Indium. Calculate the number of electrons and holes.
- The ionization energy of a carbon atom is 11.26 eV and its electron affinity is 1.26 eV Estimate the value of the Coulomb integral. α. expressing your answer both in electronvolts and as a molar energy in ki lojoules per mole.A spherical shell of inner radius a cm has a volume charge density p(r, 0) =4/2tr cos 0 c/m³. The potential energy of this configuration is 5 cm and outer radius b = 7 Inner Yadius a=5 cm Outer radius b= 7 cm Volume charge dinsity pcr,@),4 cos0 .clm? Potential EnergyFor a K*- CH ion pair, attractive and repulsive energies EA and ER, respectively, depend on the distance between the ions r, according to 5.8 x 10-6 1.436 EA and ER For these expressions, energies are expressed in electron volts per K*- CH pair, and r is the distance in nanometers. a) If the net energy EN is just the sum of the two expressions above: EN = E, + ER, Find the values of ro and E, ? b) If curves of E, ER, and EN are plotted in given figure, compare the calculated values of ro and E, with that from the graph. 2 am 0.00 010 0.20 0.30 040 0.70 00 1.00 Interatomic Separation, nm Bonding Energy, eV