ECE22xx_HW_pack01_F19.pdf - Folder Number Name ECE 2210 00 homework 1 Due Mon a5 There are a number of lockers on the 2nd floor of the MEB in the center

# ECE22xx_HW_pack01_F19.pdf - Folder Number Name ECE 2210 00...

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Folder Number______ Name__________________________ a5 ECE 2210 / 00 homework # 1 Due: Mon, 8/26/19 There are a number of lockers on the 2nd floor of the MEB, in the center hallway. These lockers have slots cut in their doors so that homework and lab notebooks can be dropped through the slots. Turn in your homework in the locker marked "ECE 2210/00 Homework". (Sometimes lockers are separated as "ECE 2200 Homework" and "ECE 2210 Homework", look carefully the first time.) Homework is due by 5:00 p.m. on the due date The following problems are not meant to be hard. You should be able to do most of them in your head with no special formulas or calculations. In fact you should find them rather dumb and trivial. That's the point, I want to drill these concepts into your head so that you'll find them easy. 1. The figure at right shows a hydraulic system with a pump that converts rotational energy to fluid energy and two turbines which convert that energy back to rotational energy. Do NOT assume that the turbines are equal in size. This is a closed system containing an incompressible fluid with no places for that fluid to collect; i.e. flow in = flow out of any point or object. Kirchhoff's current law applies. The volumetric fluid flows are indicated by the arrows. I 1 . 0.01 m 3 s I 2 . 0.007 m 3 s I 3 = _________ I 4 = _________ I 5 = _________ I 6 = _________ 2. The figure at right shows an electrical circuit with a battery that converts chemical energy to electrical energy and two resistors which convert that electrical energy to heat energy. Do NOT assume that the resistors are equal in size. All electrical circuits are closed systems containing incompressible charges with no places for those charges to collect; i.e. flow in = flow out of any point or object. Kirchhoff's current law applies. . The electrical currents are indicated by the arrows. I 1 . 0.01 A I 2 . 0.007 A I 3 = _________ I 4 = _________ I 5 = _________ I 6 = _________ 3. The figure at right shows a similar electrical circuit only now the electrical currents are indicated by the arrows next to the wires. This is a more common way to show the current flow because a little arrow in the wire is too easily confused with the electrical symbol for a diode. You'll learn about diodes later. I 2 . 20 mA I 5 . 14 mA I 6 = _________ I 1 = _________ I 3 = _________ I 4 = _________ 4. I 3 . 0.004 m 3 s I 5 . 0.001 m 3 s I 4 = _________ I 2 = _________ I 1 = _________ I 6 = _________ I 7 = _________ I 8 = _________ ECE 2210 / 00 homework # 1, p.1

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ECE 2210 / 00 homework # 1, p.2 5. I 3 . 4.5 mA I 5 . 1.2 mA I 4 = _________ I 2 = _________ I 1 = _________ I 6 = _________ I 7 = _________ I 8 = _________ 6. Again, a similar electrical circuit with the electrical current arrows in the more common position, next to the wires. I 6 . 0.03 A I 7 . 0.08 A I 8 = _________ I 1 = _________ I 2 = _________ I 3 = _________ I 4 = _________ I 5 = _________ 7. I 9 . 0.04 m 3 s I 1 = _________ I 2 = _________ I 3 = _________ I 4 = _________ I 5 = _________ closed closed I 6 = _________ I 7 = _________ I 8 = _________ I 7 = _________ I 10 = _________ 8. I 9 . 0.06 A I 1 = _________ I 2 = _________ I 3 = _________ I 4 = _________ I 5 = _________ I 6 = _________ I 7 = _________ I 8 = _________ I 7 = _________ I 10 = _________ 9. I 4 . 0.05 m 3 s I 5 . 0.014 m 3 s I 6 . 0.03 m 3 s I 1 = _________ I 2 = _________ I 3 = _________ I 7 = _________ ECE 2210 / 00 homework # 1, p.2
ECE 2210 / 00 homework # 1, p.3 10. I 4 . 20 mA I 5 . 10 mA I 6 . 22 mA I 1 = _________ I 2 = _________ I 3 = _________ I 7 = _________ 11. Careful here, there are now two pumps. Also, given the flow arrows shown, one or more of the flows must come out negative .

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