12 V

Pre-lab Exercise #2. Apply the results obtained for PH and RH in Pre-Lab Exercise #1 to

predict the voltage v that would appear at the terminals a-b, Fig. 1(b), with load resistor values

of 10 km, 12 kn, 18 kr2, 20 k2, and 24 k2. Then, complete the calculated column of Table 1.

Resistance Calculated (C) Measured (M₁) (M₁-C)/C 100% Measured (M₂) (M-M₁) M₁*100%

10 k

12 kQ

18 kf2

20 k

24 k

Table 1. Comparison of calculated and measured load voltages for original circuit and the

Thevenin equivalent circuit.

R₁-18k2

W

R₂-36k02

R-12k

R-36k2

R₁-12kQ

VTH

RTH

w

a

b

VL

(b)

Figure 1. (a) Resistive network for determining Thevenin equivalent circuit, (b) Thevenin

equivalent circuit with load resistor attached.