PHYS 102 1nd Edition Lecture 16 Outline of Last Lecture I. RC CircuitsOutline of Current Lecture II. RC Circuits Continued…Current LectureII. RC Circuits Continued…A. Two parts: 1. Combination of resistors (see handout)2. RC Circuit Charging q = Q(1- e-t/RC)Discharging q = Q(e-t/RC)Where q, is the charge on the capacitor at the time (t) and Q is the max charge on capacitor. RC = time constant ()B. RC Circuit Application1. R = 1 M = 1,000,000 charging , t = 10 second E= 30 V, q = ?, C = 5 Fq = Q(1- e-t/RC); where Q = CE = (5 X 10-6)(30)(1-e-10/10^6(5 X 10^-6))= 150 X 10-6 (1-e-2) q = 1.3 X 104 These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.2. There is a lamp, a heater, and a fan in series. (Lamp – R=150 , Heater – R=25 , Fan – R=50 , Voltage of battery is 120 V). a) What is the current? I= I1 + I2 + I3I = 120/ ReqReq = (1/150) + (1/25) + (1/50) Req = 15 I = 120/15 = 8
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