1 00:00:02,510 --> 00:00:07,350 Well welcome we've completed all our regular lessons in this module. 2 00:00:07,350 --> 00:00:12,490 So now it's time to do a Wrap Up of Module 3. 3 00:00:12,490 --> 00:00:19,840 Looking back at our Concept Map. We pulled forward the ideas of current 4 00:00:19,840 --> 00:00:25,640 and voltage, and sources and resistance from our background module. 5 00:00:25,640 --> 00:00:29,920 And from a Resistive Circuit module, we pulled forward all those methods to 6 00:00:29,920 --> 00:00:33,140 obtain circuit equations. The idea of a KCL, and KVL, mesh, node, 7 00:00:33,140 --> 00:00:39,050 and Thevenin methods all apply to reactive circuits. 8 00:00:39,050 --> 00:00:42,280 Ohm's law applies to reactive circuits. Everything we studied in Resistive 9 00:00:42,280 --> 00:00:48,260 Circuits applied in Reactive Circuits. And in the area of reactive circuits we 10 00:00:48,260 --> 00:00:51,830 looked at capacitors and inductors. We studied first order differential 11 00:00:51,830 --> 00:00:57,262 equations and how we would apply those to solving and analyzing RC, and RL 12 00:00:57,262 --> 00:00:59,590 Circuits. Then we looked at second order 13 00:00:59,590 --> 00:01:04,450 differential equations, and their basic generic solutions, and we saw how that 14 00:01:04,450 --> 00:01:08,430 can applied to RLC circuits. We looked at some applications of 15 00:01:08,430 --> 00:01:14,200 inductance and capacitance outside the area of ECE. 16 00:01:14,200 --> 00:01:17,680 The important concepts and skills that you're going to need to know in order to 17 00:01:17,680 --> 00:01:20,555 be able to do well on the quiz for this module. 18 00:01:20,555 --> 00:01:24,810 Let's start with the area of capacitance and capacitors. 19 00:01:24,810 --> 00:01:27,660 You need to understand the basic structure of a capacitor and its 20 00:01:27,660 --> 00:01:33,390 fundamental physical behavior. Understand the and be able to use the i-v 21 00:01:33,390 --> 00:01:39,200 relationship to calculate current from voltage or voltage from current. 22 00:01:39,200 --> 00:01:43,180 Be able to reduce capacitor connections using parallel and series connections. 23 00:01:43,180 --> 00:01:47,840 So if you have several capacitors, you should be able to reduce it down to one. 24 00:01:47,840 --> 00:01:49,640 Be able to calculate energy in a capacitor. 25 00:01:50,790 --> 00:01:54,240 Be able to sketch current/voltage/power/energy curves. 26 00:01:56,730 --> 00:02:01,340 For inductance and inductors, be able to describe the construction behavior of 27 00:02:01,340 --> 00:02:05,110 inductor. Be able to use the i-v relationship to 28 00:02:05,110 --> 00:02:09,800 find the current through the inductor from the voltage across it, and also, be 29 00:02:09,800 --> 00:02:12,140 able to find the voltage given the current. 30 00:02:13,350 --> 00:02:17,500 Be able to explain how voltage is created across an inductor. 31 00:02:17,500 --> 00:02:20,450 Be able to analyze inductors in series and parallel. 32 00:02:20,450 --> 00:02:23,575 And again, be able to reduce several inductors down to one. 33 00:02:23,575 --> 00:02:27,280 Be able to calculate the energy in an inductor. 34 00:02:27,280 --> 00:02:30,745 And be able to sketch current voltage power energy curves. 35 00:02:30,745 --> 00:02:37,820 We looked at first order differential equations, and under that topic, given a 36 00:02:37,820 --> 00:02:41,480 constant input, and a first order differential equation. 37 00:02:41,480 --> 00:02:45,510 You should be able to determine the steady-state value, time constant and you 38 00:02:45,510 --> 00:02:52,130 should be able to sketch the response. For RC and RL circuits, you should be 39 00:02:52,130 --> 00:02:56,230 able to write a differential equation governing the behavior of the circuit. 40 00:02:56,230 --> 00:03:00,210 And you should be able to calculate the time constant, steady-state value and be 41 00:03:00,210 --> 00:03:07,530 able to sketch the response. For second-order differential equations, 42 00:03:07,530 --> 00:03:11,460 you should be able to identify the steady-state value, be able to predict 43 00:03:11,460 --> 00:03:15,390 the type of response from the roots. We looked specifically at underdamped, 44 00:03:15,390 --> 00:03:21,270 critically damped, and overdamped, and you should be able to identify the type 45 00:03:21,270 --> 00:03:24,490 of plot. How the plot is going to look, whether a 46 00:03:24,490 --> 00:03:29,460 damp sine wave or whether it looks exponential. 47 00:03:31,240 --> 00:03:35,040 We applied the second-order differential equations to RLC circuits. 48 00:03:35,040 --> 00:03:37,360 You should be able to write the differential equation that governs 49 00:03:37,360 --> 00:03:41,476 behavior of this sort of circuit. Be able to predict the type of response 50 00:03:41,476 --> 00:03:45,880 underdamped, critically damped, overdamped. 51 00:03:45,880 --> 00:03:49,050 You should be able to compute the damping factor and the resonant frequency. 52 00:03:50,390 --> 00:03:53,530 And you should know that the smaller the damping factor, the larger the 53 00:03:53,530 --> 00:03:59,220 oscillations, [UNKNOWN] of applications. You should know the purpose of an 54 00:03:59,220 --> 00:04:05,930 oscilloscope and a function generator. You should know several applications of 55 00:04:05,930 --> 00:04:10,074 conductors and capacitors when they're used with non-electrical components. 56 00:04:10,074 --> 00:04:12,240 Speficially, we looked at sensors and actuation. 57 00:04:12,240 --> 00:04:20,100 So that concludes the first three modules of this course. 58 00:04:20,100 --> 00:04:22,529 Our next module is going to be frequency analysis. 59 00:04:24,090 --> 00:04:29,700 As a reminder, do all homework for this module, study for the quiz, and continue 60 00:04:29,700 --> 00:04:33,740 to visit the forum, to ask questions. And please try and answer questions from 61 00:04:33,740 --> 00:04:36,340 others. Thank you and good luck on the quiz.