Question

Refer to Figure Q1. The total amount of charge that has entered point A is given by: )-20l-e2) coulombs. The charging process starts at time t 0 s. The radius of the capacitor plates is 0.5 cm. ic 4 -4 Figure Q1 (a) Approximately how much charge has entered point A after 3 seconds? (b) Write an expression for the current, ic(t), as a function of time. (c) Determine the maximum current entering point A and when does it occur? (d) Determine the magnetic field B measured in Tesla at 2 mm from: (i) point A, and (ii) point B. [Hint: use displacement current]

Answer 1

Solution:

し1つ20 calumb 9(3)-20(1-exp(-%))マ15-537 calumb A15-54 Colure e-t2) dlk 2- L/2- currenti()- lo eh- c The maximum current occurres at t-0 putting t-0 in t) wehave i(t) -10

닌2- 2. O 002 竹 tl = 3.354 e