electric circuits 9th edition solution PDF

Preview

Summary

Benha University Benha Faculty of Engineering Electrical Engineering Technology (E1105) Civil Engineering Dep. Sheet (1) 1- Two electric circuits, represented by boxes A and B, are connected as shown in Fig.1. The reference direction for the current i in the interconnection and the reference polarit...

Description

Benha University Benha Faculty of Engineering

Electrical Engineering Technology (E1105)

Civil Engineering Dep.

Sheet (1)

1- Two electric circuits, represented by boxes A and B, are connected as shown in Fig.1. The reference direction for the current i in the interconnection and the reference polarity for the voltage v across the interconnection are as shown in the figure. For each of the following sets of numerical values, calculate the power in the interconnection and state whether the power is flowing from A to B or vice versa. a) i = 10 A, v = 125 V b) i = 5 A, v = -240 V c) i = -12 A, v = 480 V d) i = -25 A, v = -660 V Fig.1

2) The voltage and current are shown in Fig. 2.

Fig. 2 a) Sketch the power versus t plot for 0 < t < 10 s. b) Calculate the energy delivered to the circuit element at t = 1, 6, and 10 s. 3) The numerical values for the currents and voltages in the circuit in Fig.3 are given in Table I. Find the total power developed in the circuit.

Table I

Fig. 3

4- One method of checking calculations involving interconnected circuit elements is to see that the total power delivered equals the total power absorbed (conservation-of-energy principle). With this thought in mind, check the interconnection in Fig. 4 and state whether it satisfies this power check. . The current and voltage values for each element are given in Table II.

Fig. 4

Table II...