Data Sheet – Measured Values - answers

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Presentation transcript:

Data Sheet – Measured Values - answers DC Circuit Analysis Experiment - 4 Data Sheet – Measured Values - answers VR1 = 2.16_V VR2 = 3.76_V R1 = 100Ω R2=200Ω + + A A I1 = 21.5_ma I2 = 18.8_ma + V1=6v VR3 = 0.8__V R3=300Ω I3 = 2.6__ma + V2=3v + A Note: Draw your voltage loop arrows and current direction arrows on this sheet. A = Ammeter locations (Three measurements)

Data Sheet 2 – Computed Values - amswers DC Circuit Analysis Experiment - 4 Data Sheet 2 – Computed Values - amswers Compute the currents and voltages for each resistor. Enter here: VR1 = 2.18____ v VR2 = 3.76____ v VR3 = 0.78____ v IR1 = 21.82___ ma IR2 = 19.1____ ma IR3 = 2.72____ ma Eq 1: I1 = I2 + I3 (Sum of junction currents rule) Eq 2: V1 – I1R1 – I3R3 – V2 = 0 (loop rule) Eq 3: V2 + R3I3 – R2I2 = 0 6 – 100I1 – 300I3 – 3 = 0 (put in values on eq 2) 100I1 + 300I3 = 3 (reduce) 100(I2 + I3) + 300I3 = 3 (sub eq1 for I1) 100I2 + 400I3 = 3 (reduce) I2 = (3 – 400I3)/100 300I3 – 200I2 = -3 (Eq 3 reduced) 300I3 – 200 (3 – 400I3) = -3 (sub I2 into above) 100 300I3 – 6 + 800I3 = -3 (reduce) I3 = 3/1100 = 0.00272A = 2.72ma I2 = 3 – 400I3 /100 = 3 – 400(0.00272)/100 = (3 – 1.09)/100 = .0191A = 19.1ma I1 = 19.1ma + 2.72ma = 21.82ma (from Eq 1)