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# lab6writeup - Lab 6 C.J Gorrell DC Circuit Analysis Using...

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Lab 6 C.J. Gorrell DC Circuit Analysis Using PSpice ENME350 0102 3/1/10

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Picture 1 I. Objective – At the conclusion of this lab one should be able to use PSpice to identify the behaviors of RC and RL circuits as well as identify the time constants of a circuit. II. Instruments used A. Computer B. PSpice application III. RC circuit A. Experimental Setup: Construct the circuit below using PSpice. Starting with R1 and R2 having values of 1k ohm each graph the voltage and current across the capacitor after the switch is closed. Repeat these measurements for R1 and R2 values 100k ohm1k ohm, 1k ohm 100k ohm, and 10k ohm and 1k ohm respectively.
Ti me 0s 1.0m s 2.0m s 3.0m s 4.0m s 5.0m s 6.0m s V(C1:2) 0V 2.5V 5.0V Time s s s s s s -I(C1) -5.0mA 0A 5.0mA B. Data: R1=1k ohm R2= 1k ohm

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Ti me 0s 1.0m s 2.0m s 3.0m s 4.0m s 5.0m s 6.0m s V(C1:2) 0V 2.5V 5.0V s s s s s s -I(C1) -50mA 0A 50mA R1= 100k ohm R2= 1k ohm
Ti me 0s 1.0m s 2.0m s 3.0m s 4.0m s 5.0m s 6.0m s V(R2:2) 0V 2.5V 5.0V Time s s s s s s -I(C1) -200mA 0A 200mA 400mA R1= 1k ohm R2= 100k ohm

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Ti me 0s 1.0m s 2.0m s 3.0m s 4.0m s 5.0m s 6.0m s V(C1:2) 0V 2.5V 5.0V s s s s s s -I(C1) -20mA 0A 20mA 40mA R1= 10k ohm R2= 1k ohm
C. Calculations: Req= R1||R2 Time constant= RC Vss= VsR2/(R1+R2) Iss= 0 1k 1k 100k 1k 1k 100k 10k 1k Vss (Volts) 2.5V .495 4.95 .454 Iss (amps) 0 0 0 0 τ (seconds) .0005 .001 .001 .001 D. Analysis- The graphs are smooth in the intervals of o<t<40, and 40<t<200

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lab6writeup - Lab 6 C.J Gorrell DC Circuit Analysis Using...

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