The diffusion length would always increase with temperature since more energy would be supplied to the charge carrier to move before scattering.
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true or false
The diffusion length would always increase with temperature since more energy would be supplied to the charge carrier to move before scattering.
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- A close analogy exists between the flow of energy by heat because of a temperature difference (see Section 20.7) and the flow of electric charge because of a potential difference. In a metal, energy dQ and electrical charge dq are both transported by free electrons. Consequently, a good electrical conductor is usually a good thermal conductor as well. Consider a thin conducting slab of thickness dx, area A, and electrical conductivity o, with a potential difference dv between opposite faces. (a) Show that the current I = dq/dt is given by the equation on the left: Charge conduction Thermal conduction dq TA dt JdT| kA dt dQ | dx |AP| |dx In the analogous thermal conduction equation on the right (Eq. 20.15), the rate dQ/dt of energy flow by heat (in Sl units of joules per second) is due to a temperature gradient dT/dx in a material of thermal conductivity k. (b) State analogous rules relating the direction of the electric current to the change in potential and relating the direction of…3. Let E = (-2)x+ây +5₂ V/m and calculate (a) VPQ given P(-7,2,1) and Q(4,1,2) (b) Vp if V = 0 at Q (c) Vp if V = 0 at (2,0,-1)In a parallel-plate diode, the anode is at 100 V with respect to the cathode which is 10 mm away from it. An electron is emitted from cathode with an initial velocity towards cathode of 1x10 m/s. The arrival velocity of the electron at anode is ..
- In empty space there is (-∞, 0) semi-infinite linear uniform and constant charge density ρl = 3 [C / m] on the z-axis. Calculate the electrostatic field that this charge density will create at the point C (0,0,4). ke = 1 / 4πε Write numerically the components of the electrostatic field in terms of the given quantities.Compute for the work done, in millijoules, in moving a 2-nC charge from A(2, 4, 2) m to B(4, 0, -2) m against the electric field due to a disk charge of radius 2 m on the plane x = 0. The disk has total charge of 8 mC.Is this statement True or False: "Gaussian elimination consists of two parts: Forward phase and backward phase. "
- Compute for the work done, in millijoules, in moving a 4-nC charge from A(4, -2, -4) m to B(3, -1, 2) m against the electric field due to a disk charge of radius 2 m on the plane x = 0. The disk has a total charge of 8 mC.A particle of charge e and mass m is located at the midpoint of the line joining two fixed collinear dipoles with unit charges as shown in the figure. (The particle is constrained to move only along the line joining the dipoles). Assuming that the length of the dipoles is much shorter than their separation, the natural frequency of oscillation of the particle is iiConsider the following electrostatic problem. A perfectly conductive spherical conductor of radius a=5cm is covered by a dielectric layer extending to a radius of b%3D8cm in free space. Relative electrical permittivity of the dielectric iS E 4, and Electric Flux Density expression in the medium is given as (D = 0.05r-u,: Cim, for ra), where r is radial distance from the center of sphere. a) What is the total charge on the conductor surface? b) Determine Electric field intensity for each region (rAt the surface of any conductor in electrostatic equilibrium, E=o/ɛ0. Show that this equation is consistent with the fact that E=kq/r at the surface of a spherical conductor.Please helpIn an electrostatic boundary value problem, the surface charge density o is specified at x = 0. The corresponding boundary condition for potential V can be written as 1 o(ya) 1 Lo(yz) (a) (b) x=0 x=0 Əv (c) ´av (d). 1 1 -6(yz) o(y.z) =+- x=0SEE MORE QUESTIONSRecommended textbooks for youCollege PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
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