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- The space between the plates of a parallel-plate capacitoris lled with two slabs of linear dielectric material, parallelto the plates. Each slab has thickness L, so that the totaldistance between the plates is 3L. Slab 1 has a dielectricconstant of 2, and slab 2 has a dielectric constant of 2.5.The free charge density on the top plate is σ and on thebottom plate is -σ.a) Find the electric displacement ~D in each slab. b) Find the electric eld ~E in each slab.c) Find the polarization ~P in each slab.d) Find the location and amount of all bound charge.Solve for the final resistance of the following.6-43. Figure 6-25(a) shows two anti-parallel, infinite length strips of width w and vertical separation d. Find the force per unit length between strips. (a) Figure 6-25. Anti-parallel current-carrying strips (a) in the same plane (b) in parallel planes.
- A potentiometer wire has length 5 m; it is connected to a battery. For a certain cell, the null point is at 250 cm, if the length of potentiometer wire is increased by 1 m, where will be the new position of the null point?please exaplain in dtails and clear also write clearly to under stand and send me asap pleaseHelp me to solve this question, only typing
- Let us we consider two resistors in series, both with the same dimensions, and the same effective mass. The first resistor has a scattering rate t, and the second has a scattering rate of t71. They both have area A and length L and the same charge density and effective masses. (i) Calculate the total resistance, then by treating the total resistance of the circuit as a resistor of length L, area A, show that the total scattering rate for the combined circuit, t' can be written as t, = t1 +t7. If t1=100 Terahertz, and t,1=AT where A=0.3 Terahertz/Kelvin and T is the temperature, assuming that n, e and m* remain constant, sketch the dependence of the conductivity on the temperature. If the fermi energy is 12 eV and the effective mass is 0.4me what is the conductivity at room temperature (303 K)? (ii) (iii)(a) Define the electromotive force and explain the physical mechanism of theelectromotive force source.(b) One circuit has constructed by electromotive force source which has ε = 5Vand inner resistivity r = 1Ω. Two serial connected resistances which havevalues of R1 = 1Ω and R2 = 5Ω placed in that circuit. Calculate thepowers dissipated in R1, R2 and r.Why can't the current flow uniformly (linear over time) when the capacitor is charging or discharging? For example, why doesn't the charge just flow at a steady rate off of the capacitor while discharging?
- The terminal voltage of an isolated practical battery of EMF 8 V is: also 8 volts; O (The direction of the current it supplies should be given to determine whether the terminal voltage is less or greater than the EMF.) greater than 8 volts; less than 8 volts;(b) what are the following potential differences? Vw-Vz Vx-Vy Vx-Vw Vz-Vy (c) if we define the electric potential at the negative terminal of the battery to be zero, what are the electric potentials at points W, X, Y, and Z? (d) what is the current through the resistor? through wire XY? through the battery?