Lab 2 Series-Parallel

1.  Describe the difference between regular (ohmic) resistors and non-linear/negativecomponents. How would the presence of a non-linear or negative component changehow you might analyze a circuit?

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

Given the circuit shown in the figure, use the words “increases,” “decreases,” or “stays the same” to complete the following statements. (a) If R7 increases, the potential difference between A and E _____. Assume no resistance in the ammeter and the power supply (b) If R7 increases, the potential difference between A and E _____. Assume nonzero resistance in the ammeter and the power supply (c) If R7 increases, the voltage drop across R4 _____. (d) If R2 decreases, the current through R1 _____. (e) If R2 decreases, the current through R6 _____. (f) If R2 decreases, the current through R3 _____. (g) If R5 increases, the voltage drop across R2 _____. (h) If R5 increases, the voltage drop across R4 _____. (i) If R2, R5, and R7 increase, ℇ (r = 0) _____.

Circuit with Three Open and Closed Switches-Ammeter Readings Shown below is a DC circuit that contains a number of switches. The resistance of each switch is negligible when closed. All of the connecting wires may be considered to have zero resistance. All of the resistors shown are identical. The circuit contains an ideal ammeter. The diagram shows all of the switches open. Beside the diagram are eight different switch configurations for the circuit. Rank these configurations in terms of the ammeter reading. That is, put first the configuration for which the ammeter gives the largest reading, and put last the configuration for which the ammeter gives the smallest reading. If two or more configurations produce the same ammeter reading, give these configurations equal ranking. Configuration S1 S2 S3 Оpen Оpen Оpen S1 Орpen Орen Closed Оpen Closed Оpen Оpen Closed Closed S2 Closed Оpen Оpen Closed Оpen Closed G Closed Closed Оpen H Closed Closed Closed Largest 1 3 4 6. 7 8. Smallest Or,…

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

Answer all the questions You have 6 PV panels that each have the same I-V curve (ISC = 5.5 A, VOC = 45 V). (a) How many connection configurations that use all 6 panels are possible? Draw each one. (b) Draw the I-V curves for each of the configurations on one graph. You may draw the curves by hand or use a software of your choice. Clearly label each curve. (c) Assume you are to power a 2.5 Ω load with the panels. Knowing that dimmer sunlight reduces the current output of the cells but not the output voltage, what configuration would be best if you were to build it? Explain your answer.

Make three plots using Excel: 1. Voltage vs current for the linear resistor data (voltage on vertical axis, current on horizontal). Add a linear trendline with the equation and R² value shown. 2. Voltage vs current for the lightbulb data (voltage on vertical axis, current on horizontal). 3. A plot showing both curves on the same set of axes (voltage on vertical axis, current on horizontal).

Calculate the resistance per-foot of a 250-KCMIL wire? Calculate the ohms/KFT of 250 KCMIL wire? Calculate the total resistance of 500 feet of 3/8" Cu wire. Find R total of a 2-wire circuit loaded to 200A, run in conduit between two panelboards 175 feet apart; supply is 240V and conductors are 250-KCMIL copper. Calculate the voltage drop of question #13. Is the Vd from question #14 within the 3% allowance recommended by the Code? #14 THHN Cu wire is to be run in a 150' raceway to supply a 120V/12A load.  Find the Vd and % Vd.  What would be the voltage drop @ 3% Vd in question #16?    What minimum AWG size would we use to limit Vd to 3% in question #16?

Ohm's Law states that the electric current flowing though a ________ is directly proportional to the ________. Select one: a. closed circuit --- total resistance b. closed circuit --- switch resistance c. open circuit --- supply voltage d. closed circuit --- supply voltage