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LAB 217

# LAB 217 - LAB 217 Mehar Ghei LABORATORY EXPERIMENT REPORT...

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LAB 217 Mehar Ghei LABORATORY EXPERIMENT REPORT Name: Mehar Ghei Group Members: Yvonne Chen, Marvin Castellon, Jeremy Buhain Experiment Date: Thursday, March 24 th Course Name: PHYS 121A Section: H02 Instructor: Beidi He LABORATORY #217 RC Circuits 1. OBJECTIVE To observe and analyze the voltage across a capacitor V c as a function of time t in a circuit containing a resistor and capacitor connected in series. 2. THEORETICAL BACKGROUND = Vo Vc = = Vc qoC Vo = I 0 ( )= ( ) Vc t q t C = iR dqdtR + = dqdtR qtC 0 = - / qt q0e t RC = = - / Vt qtC V0e t RC = - lnVtVo 1RTt 3. EQUIPMENT a. Banana Cables b. Electronic connection Board c. DC power supply d. Resistors e. Digital multimeter f. Voltage Probe g. Stop watch h. LCR meter i. Capacitors j. ULI interface 4. COLLECTED DATA Page 1 of 15

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LAB 217 Mehar Ghei A] T 0 5 10 15 20 30 40 50 60 V 4.942 4.1 3.87 3.3 2.94 2.23 1.7 1.31 1.01 Capacitor: 1000 microFarad Discharging Capacitor: C= 1000*10^-6; %capacitance of 1000 microFarad R = 33*1000; %resistance 33 kohm V0 = 5; %maximum voltage (V0) 5V t=0:0.01:200; %time in seconds tau = R*C; % time constant in seconds Vt = V0*exp(-t/tau); Yth = log(Vt/V0); texp = [0 5 10 15 20 30 40 50 60]; %timme in sec Vexp = [4.942 4.1 3.87 3.3 2.94 2.23 1.7 1.31 1.01]; %measured voltage in V measured Yexp = log(Vexp/V0); subplot (2,1,1); plot(t,Vt,texp,Vexp, 'x'
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LAB 217 - LAB 217 Mehar Ghei LABORATORY EXPERIMENT REPORT...

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