Q: Suppose the circuit in Fig. 7.41 has been connected
Suppose the circuit in Fig. 7.41 has been connected for a long time when suddenly, at time t = 0, switch S is thrown from A to B, bypassing the battery. (a) What is the current at any subsequent time...
See AnswerQ: Two tiny wire loops, with areas a1 and a2, are
Two tiny wire loops, with areas a1 and a2, are situated a displacement r apart (Fig. 7.42). (a) Find their mutual inductance. [Hint: Treat them as magnetic dipoles, and use Eq. 5.88.] Is your formula...
See AnswerQ: An infinite cylinder of radius R carries a uniform surface charge σ
An infinite cylinder of radius R carries a uniform surface charge σ . We propose to set it spinning about its axis, at a final angular velocity ωf . How much work will this take, per unit length? Do it...
See AnswerQ: A fat wire, radius a, carries a constant current I
A fat wire, radius a, carries a constant current I , uniformly distributed over its cross section. A narrow gap in the wire, of width w
See AnswerQ: The preceding problem was an artificial model for the charging capacitor,
The preceding problem was an artiï¬cial model for the charging capacitor, designed to avoid complications associated with the current spreading out over the surface of the plates. For a...
See AnswerQ: Refer to Prob. 7.16, to which the correct
Refer to Prob. 7.16, to which the correct answer was / (a) Find the displacement current density Jd . (b) Integrate it to get the total displacement current, (c) Compare Id and I . (Whatâ€...
See AnswerQ: Suppose / (The theta function is defined in Prob
Suppose / (The theta function is defined in Prob. 1.46b). Show that these fields satisfy all of Maxwell’s equations, and determine ρ and J. Describe the physical situation that gives rise to these fi...
See AnswerQ: Assuming that “Coulomb’s law” for magnetic charges (qm )
Assuming that “Coulomb’s law†for magnetic charges (qm ) reads work out the force law for a monopole qm moving with velocity v through electric an...
See AnswerQ: Check Corollary 1 by using the same function and boundary line as
Check Corollary 1 by using the same function and boundary line as in Ex. 1.11, but integrating over the ï¬ve faces of the cube in Fig. 1.35. The back of the cube is open.
See AnswerQ: Suppose a magnetic monopole qm passes through a resistanceless loop of wire
Suppose a magnetic monopole qm passes through a resistanceless loop of wire with self-inductance L. What current is induced in the loop?27
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