Piz Area 2 Area 1 Xlic 11.In the figure shown above, if the power transferred from area 1 to area 2 is increased by AP12-0.037037 pu due to load 2 increase by APL2 0.010 pu, B1 0.20, D2-0.02, then the value of R2 is: a. 3 b. 3.5 c. 4 d. 5 e. none

Suppose the three branch currents in this circuit are I₁ = -3 A, I₂ = -18 A, and I3 = -15 A. The voltage drop across each circuit element is as given in the table below. From this information, determine, for each of these circuit elements, (i) whether an active or passive sign convention is being used for that element, (ii) whether that element is absorbing or producing a net (positive) amount of electrical power. In each answer box within the table below, type the correct choice from among the bold-faced words above. V₂ B A B A C D 1₁ A B 1₂ 1₂ + Circuit element Voltage drop Sign convention? Absorbing or producing net electrical power? -9 V -2 V C 9 V -11 V D

39. You and your lab partner have built the circuit shown in Figure 1.56. The three resistors, R1, R2 and R3 all have resistances of 1 k2, while the two voltage sources have 5 V and 3 V (as shown). The circuit has two output terminals, A and B. Answer the following questions about the circuit. (NOTE: The orientation of the voltage sources is important.) (a) What is the voltage drop across R1 R2 R3 A 5 V 3 V B Figure 1.56: The circuit for problem 39. R3? (b) What is the current flowing through R1? (c) Sketch the Thévenin equivalent circuit as seen looking into the terminals A and B. What is the Thévenin voltage, Vth, of the circuit? (d) What is the power supplied by the two voltage sources? (e) In order to safely determine the Thévenin resistance of your circuit, you connect a fourth resistor, R4 = 1 k2, between A and B. Using your trusty yellow DVM, you measure a potential difference across R4 to be 0.4 V. Using %3D

answer the follwing: regarding resistance