I 0 a ↑ I b

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I 0 A I B 1 (17.2 KiB) Viewed 18 times

(a) Using Ampere's law, determine the magnetic field generatedby the wires in all regions. Explain your reasoning.
(b) What is the magnetostatic energy stored per unit volume ofthe wire.
(c) Using the result of part (b), first write down an expressionwhich gives the energy stored in a cylindrical shell of length L,radius r and thickness dr. Integrate this expression to get thetotal magnetostatic energy stored in the wire.
(d) Suppose that between the two wires, there is a thin layer ofcharge at the surface r = a with uniform surface charge density σ.Determine the electric field in the region a < r < b. (e)Compute the Poynting vector S and use it to determine the totalelectromagnetic energy flux, P, through the wire.
e) Compute the Poynting vector S and use it to determine thetotal electromagnetic energy flux, P, through the wire.
I 0 a ↑ I b