Problem 7.35 The preceding problem was an artificial model for the charging ca-pacitor, designed to avoid complications associated with the current spreading outover the surface of the plates. For a more realistic model, imagine thin wires thatconnect to the centers of the plates (Fig. 7.46a). Again, the current I is constant,the radius of the capacitor is a, and the separation of the plates is w <

Answered: Problem 7.35 The preceding problem was…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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5.11 Two perfectly conducting cylindrical surfaces are located atp= 3 and p = 5 cm. The total current passing radially outward through the med- ium between the cylinders is 3 A de. (a) Find the voltage and resistance between the cylinders, and E in the region between the cylinders, if a conducting material having o = 0.05 S/m is present for 3 < p < 5 cm. (b) Show that integrating the power dissipated per unit volume over the volume gives the total dissipated power.
Let N be a two-terminal network in which the capacity of each arc is 6, and xy, yz, yweE(N) with id(y)=1 and od(y)=2. If f is a legal flow of N such that f(yz)=4 and f(yw)=1, then f(xy)= 6. None of the other choices 8. 4
Problem 7.63 Prove Alfven's theorem: In a perfectly conducting fluid (say, a gas of free electrons), the magnetic flux through any closed loop moving with the fluid is constant in time. (The magnetic field lines are, as it were, "frozen" into the fluid.) (a) Use Ohm's law, in the form of Eq. 7.2, together with Faraday's law, to prove that if o ∞o and J is finite, then 7.3 Maxwell's Equations a slightly different approach to the same problem, see W. K. Terry, Am. J. Phys. 50, 742 (1982). R ƏB at S do= =V x (v x B). FIGURE 7.58 (b) Let S be the surface bounded by the loop (P) at time t, and S' a surface bounded by the loop in its new position (P) at time t + dt (see Fig. 7.58). The change in flux is S' dt B(t + dt) da + do = dt S B(t + dt) da - Use VB0 to show that S √₂³ (where R is the "ribbon" joining P and P'), and hence that ав l vdt at dt B(t + dt) da = S B(t). da. da - R S B(t + dt) da B(t + dt) da (for infinitesimal dt). Use the method of Sect. 7.1.3 to rewrite the second inte-…
1.5 Assume that a 20 V voltage drop occurs across an element from terminal 2 to terminal 1 and that a current of 4 A enters terminal 2. a) Specify the values of v and i for the polarity references shown in Fig. 1.6(a)–(d). b) State whether the circuit inside the box is absorbing or delivering power. c) How much power is the circuit absorbing? Answer: (a) Circuit 1.6(a): v = -20 V, i = -4 A; circuit 1.6(b): v = -20 V, i = 4 A; circuit 1.6(c): v = 20 V, i = -4 A; circuit 1.6(d): v = 20 V, i = 4 A; (b) absorbing; (c) 80 W. 1 +2 (а) р %3D vi (b) р — — vi •1 2 (с)р %3D — vi (d) р %3D vi Figure 1.6 A
For multipole expansion, under what conditions, if any, is it an exact expression, and under what conditions, if any, is it an approximation? In what limits/cases is it the most useful?
Help me to solve this question, only typing
Homework 3.1: Using Kirchhoff's voltage law and Fig. 3.9, verify that RT = R1 + R2 + R3 + V, - + V, - + V - R1 R2 RT E Fig. 3.9: The circuit of Homework 3.1

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