ECE 201- Final Exam Guide - Comprehensive Notes for the exam ( 41 pages long!)

• School: Drexel University
• Department: Electrical & Computer Engr
• Course: ECE 201
• Professor: Kurzweg Timothy

Document Summary

Determine the current i(t) flowing through a certain device if the cumulative charge that has flowed through it up to time t is given by. 1: q(t) = 0. 45 t3 c, q(t) = 12 sin2(800 t) mc, q(t) = 3. 2 sin(377t) cos(377t) pc, q(t) = 1. 7 t [1 e 1. 2t ] nc. 121 800 10. + = 2 12 800 10. + 800 800. = 3. 2 377 cos2377t + 3. 2 377 sin2377t 10. e1. = 1. 7 1 e 1. 2 + 1. 7t 1. 2 e 1. 2. Solution: v2 = 48 v this voltage is referenced to ground. From part (b), v34 = 24 v, which means v3 is above v4 by 24 v. hence, v3 = +24 v. From the earlier configuration, v2 was 40 v above v4. Hence, in the new configuration v5 = 12 v. With b now ground, d is -9 v: v above b.