Figure a shows the current i that is produced in a wire of resistivity 1.62 × 10^–8 Ω · m. The magnitude of the current versus time t is shown in Figure b. The vertical axis scale is set by i_s = 10.0 A, and the horizontal axis scale is set by i_s = 50.0 ms. Point P is at radial distance 9.00 mm from the wire's center. Determine the magnitude of the magnetic field B_i at point P due to the actual current i in the wire at

(a) t = 20 ms,

(b) t = 40 ms, and

(c) t = 60 ms. 

Next, assume that the electric field driving the current is confined to the wire. Then determine the magnitude of the magnetic field B_id at point P due to the displacement current i_d in the wire at

(d) t = 20 ms,

(e) t = 40 ms, and

(f) t = 60 ms. At point P at t = 20 s, what is the direction (into or out of the page) of

(g) B_i and

(h) B_id?

Transcribed Image Text:

Wire 0 t (ms)