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Study Guide Module 2 ECET 207 Name___________________________________ Figure 16.3 1) See Figure 16.3. Which one equation describes the total impedance ZT for this circuit? A) ZT = Z1 + Z2 - Z3 B) ZT = (Z1 + Z2 ) Z3 C) ZT = Z1 + Z2 + Z3 D) ZT = (Z1 Z2 ) Z3 1) Figure 16.4 2) See Figure 16.4. Which one of these statements is true? A) I3 = I 2 + I 5 B) I4 = I 6 C) I3 = I 4 + I 6 2) D) IS = I 3 3) See Figure 16.4. If E = 10 V ≥30° and IS = 5 A ≥10°, what is the total impedance ZT? A) 32.1 Ω + j38.3 Ω B) 1.88 Ω + j0.68 Ω C) 38.3 Ω + j32.1 Ω D) 0.47 Ω - j0.17 Ω 1 3) Figure 16.5 4) See Figure 16.5. What is the total admittance YT of this circuit? A) 63.73 S ∠11.3° B) 0.016 S ∠-11.3° C) 0.02 S ∠90° 5) See Figure 16.5. What is the value of current I1 ? A) 1 A ∠120° B) 0.72 A ∠26.3° 4) D) 0.028 S ∠-56.3° 5) C) 1.39 A ∠-26.3° D) 1 A ∠-120° Figure 16.2 6) See Figure 16.2. If L = 10 mH, what is the applied frequency? What is the value of the capacitor? 6) Figure 17.1 7) See Figure 17.1. The voltage source (a) consists of E = 50 V ∠20° and Z = 100 Ω ∠30°. If this voltage source is converted to a current source (b), what is the value of the current I? A) 5000 A ∠50° B) 0.5 A ∠-10° C) 50 A ∠20° D) 2.0 A ∠10° 2 7) Figure 17.3 8) See Figure 17.3. Which one equation describes current I2 ? A) I2 = (V1 + V2 )/Z2 B) I2 = -IA C) I2 = (V1 - V2 )/Z2 D) I2 = I 4 + I A 8) Figure 17.8 9) Referring to the circuit shown in Figure 17.8, determine the current through the 2 Ω inductor, by using Mesh Analysis. A) 3.61 A ∠124° B) 20.0 A ∠-143° C) 4.47 A ∠153° 9) Figure 18.1 10) See Figure 18.1. Using the superposition theorem, what is the portion of the current through the capacitor caused by the 10V ∠0° voltage source? A) 0.822 A ∠9.46° B) 5.0 A ∠90° C) 0.616 A ∠130° D) 0.741 A ∠55.6° 3 10) Figure 18.2 11) See Figure 18.2. What is the Thevenin voltage external to ZL? A) 3.33 V ∠0° B) 3.33 V ∠-26.6° C) 10 V ∠0° 11) D) 4.47 V ∠-63.4° Figure 18.3 12) See Figure 18.3. What is the Norton equivalent impedance ZN external to ZL? A) 10.0 Ω ∠0° B) 11.18 Ω ∠26.6° C) 5.0 Ω ∠90° D) 0.47 Ω ∠-26.6° 12) 13) In a series circuit, if E=50∠0 and I=6∠-90, then the load is purely ________________. A) capacitive B) inductive C) resistive 13) 14) In order to remove a current source from a circuit, we must replace it with an __________ circuit. 4 14) Figure 17.4 15) See Figure 17.4. Assume that the bridge is balanced. If Z1 = 20 Ω ≥0°, Z2 = 15 Ω ≥30°, Z3 = 4 Ω ≥-10°, what must Z4 be? A) 3 Ω ≥20° B) 8 Ω ≥20° C) 25 Ω ≥-10° D) 2 Ω ≥40° 5 15) Answer Key Testname: MODULE2_SG 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) 14) 15) B C B B C 159 Hz, 100 µF B C A A D B B open A 6