1. 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)

2. 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)
100I I3 = 3 (reduce)
100(I2 + I3) + 300I3 = 3 (sub eq1 for I1)
100I I3 = 3 (reduce)
I2 = (3 – 400I3)/100
300I3 – 200I2 = -3 (Eq 3 reduced)
300I3 – 200 (3 – 400I3) = -3 (sub I2 into above)
300I3 – I3 = -3 (reduce)
I3 = 3/1100 = A = 2.72ma
I2 = 3 – 400I3 /100 = 3 – 400( )/100 = (3 – 1.09)/100 = .0191A = 19.1ma
I1 = 19.1ma ma = 21.82ma (from Eq 1)