2.2 Network Media Reading Assignment answers

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Vdc0 U=12 V Circuit #1 Ried V LED www Ried_series 0.05 Vdc0 U = 12 V 0,04 Circuit 0.03 0.02 0.01 RED LED GREEN LE Set current to 10 mA LED voltages Given the circuit #1 presented above, answer the following questions: BLUE_LEC Red 0.5 1) Determine the value of the V₁ (voltage forward of the LED) for the LEDS RED, VDRED GREEN, VREEN and BLUE, VOBLUES when the current through the LEDs is 10mA, 2) Is the LED in Circuit #1, connected in the way that will be lighting up or not - Justify your answer Green 3) Calculate the value of the resistance Rled in Circuit #1, to ensure that a RED LED will have a current of 10 mA 1.5 2 25 Voltage across LED (V) 4) Calculate the value of the resistance Rled in Circuit #1, to ensure that a GREEN LED will have a current of 10 mA Blue 5) Calculate the value of the resistance Rled in Circuit #1, to ensure that a Blue LED will have a current of 10 mA 6) Given three LEDs, connected in series as shown in the Circui # 2 (below), calculate the value of the…

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It is often desirable in designing an electric wiring system to be able to control a single appliance from two or more locations, for example, to control a lighting fixture from both the top and bottom of a stairwell. In home wiring systems, this type of control is implemented with three-way and four-way switches. A three-way switch is a three-terminal, two-position switch, and a four-way switch is a fourterminal,two-position switch. The switches are shown schematically in P2.40(a), which illustrates a three-way switch, and 2.40(b), which illustrates a four-way switch. If the lamp (appliance) is to be controlled from more than twolocations, four-way switches are used in conjunction with twothree-way switches. One four-way switch is required for eachlocation in excess of two. Show how one four-way switch plus twothree-way switches can be connected between a and b in P2.40(c) to control the lamp from three locations. (Hint: The fourwayswitch is placed between the three-way switches.)

For the following switch circuit: A) Derive the switching algebra expression that corresponds one to one with the switch circuit. B)  Derive an equivalent switch circuit with a structure consisting of a parallel connection of groups of switches connected in series. (Use 8 switches.) C) Derive an equivalent switch circuit with a structure consisting of a series connection of groups of switches connected in parallel. (Use 7 switches.)

Which of the following-combinations cannot be combined into K-map groups?   A. corners in the same row   B. corners in the same column   c. diagonal   D. overlapping combinations.

For Figure 1 switch circuit: a. derive the switching algebra expression that corresponds one to one with the switch circuit. b. derive an equivalent switch circuit with a structure consisting of a parallel connection of groups of switches connected in series. (Use 9 switches.) c. derive an equivalent switch circuit with a structure consisting of a series connection of groups of switches connected in parallel. (Use 6 switches.) B' Figure 1. Switch Circuit

1. Which of the following statements is true?a. Terminal A is negative with respect to terminal D.b. Terminal D is negative with respect to terminal A.c. A voltmeter connected between terminals A and C would measure 40Vdc.d. Terminal A is positive with respect to terminal D.2. Which of the following statements is true?a. ES = ER1 – ER2 – ER3b. ER1 – ER2 – ER3 = 100Vdcc. ES = ER1 + ER2 + 30 Vdcd. ER1 + ER2 + ER3 = ES3. What is the value of resistor R1?a. 5000 Ωb. 1500 Ωc. 3000 Ωd. 10 000 Ω 4. What is the voltage drop between points A and B?a. 45 Vdcb. 15 Vdcc. 10 Vdcd. 60 Vdc 5. What is the voltage drop between points B and C?a. 5 Vdcb. 15 Vdcc. 10 Vdcd. 7.5 Vdc6. What is the value of resistor R2?a. 500 Ωb. 1000 Ωc. 1500 Ωd. 3000 Ω7. Refer to TLO 4, Fig. 4-3 and Exercise Procedure 4. What is the approximatedresistance of DS1 when lighted?a. 35 Ωb. 75 Ωc. 42 Ωd. 100 Ω 5. What is the voltage drop between points B and C?a. 5 Vdcb. 15 Vdcc. 10 Vdcd. 7.5 Vdc6. What is the value of resistor…

1. Which of the following statements is true?a. Terminal A is negative with respect to terminal D.b. Terminal D is negative with respect to terminal A.c. A voltmeter connected between terminals A and C would measure 40Vdc.d. Terminal A is positive with respect to terminal D.2. Which of the following statements is true?a. ES = ER1 – ER2 – ER3b. ER1 – ER2 – ER3 = 100Vdcc. ES = ER1 + ER2 + 30 Vdcd. ER1 + ER2 + ER3 = ES3. What is the value of resistor R1?a. 5000 Ωb. 1500 Ωc. 3000 Ωd. 10 000 Ω 4. What is the voltage drop between points A and B?a. 45 Vdcb. 15 Vdcc. 10 Vdcd. 60 Vdc 5. What is the voltage drop between points B and C?a. 5 Vdcb. 15 Vdcc. 10 Vdcd. 7.5 Vdc6. What is the value of resistor R2?a. 500 Ωb. 1000 Ωc. 1500 Ωd. 3000 Ω7. Refer to TLO 4, Fig. 4-3 and Exercise Procedure 4. What is the approximatedresistance of DS1 when lighted?a. 35 Ωb. 75 Ωc. 42 Ωd. 100 Ω 5. What is the voltage drop between points B and C?a. 5 Vdcb. 15 Vdcc. 10 Vdcd. 7.5 Vdc6. What is the value of resistor…

Most residential general lighting circuits are wired with 14-AWG copper conductors and are protected by 15-amp circuit breakers. However, there are many electricians who install 12-AWG copper conductors and protect them with 20-amp circuit breakers. How will you know which conductor size and which circuit breaker size will be used for the general lighting branch circuits in the house you are wiring?

Compared to the original circuit that it replaces, an equivalent circuit will always have:a. the same power dissipation.b. the same number of componentsc. the same voltage and current for a specific loadd. all of the above

17- The electromechanical breakdown depend on the type of the dielectric between two electrodes a- Right. b- Wrong 18- Basic Insulation Level (BIL) is related to the design consideration of the electric device, while Basic protection (BPL) level is related to protection level of the that device. a Right. Wrong. b- 19- As the voltage regulation increased, receiving end voltage will be reduced. Right. b- Wrong 20- We can be using Solar power generation field as a power factor and voltage profile enhancement in Distribution system. (aRight. b- Wrong. 21- From the general electrostatic theories, the field strength at breakdown is given by: a Eb = V/ do =0.6 [Y/ (€ o Er) ] 0.5. b- Eb V/ do = 0.6 [Y / (€ 0/Er )] 0.5. C- Eb V/ do = 0.6 [ Y/(Eo Er) 20.05. d- Eb V/ do = 0.6 [ Y/ (Eo Er) 10.5. 22- Consider plane electrodes with a solid insulator between them. Find the electric field strength at breakdown, if Young's modulus = 10000 (V.F/m2). and the relative permittivity is (36000 TT). If the…