1. Lecture 1: Intro & Circuit Variables Nilsson 1.1-1.6 ENG17 (Sec. 2): Circuits I Spring 2014 1 April 1, 2014

2. Overview Personal Introduction Course Introduction Units Circuit Analysis Voltage & Current Basic Circuit Element Power & Energy 2

3. Dr. Kyle Montgomery B.S. 2004 University of Houston 3 years @ Schlumberger M.S. 2008 Purdue University Ph.D. 2012 Purdue University –Thesis: Novel Approaches for Wide Bandgap Solar Cells 3

4. What I do now…besides teach… Advise students Research –Novel solar cells w/compound semiconductors –New materials for lighting, solar cells, and beyond –High speed, high power transistors –Alternative energy storage solutions 4

5. Philosophy…on teaching…and life Teaching is not confined to classroom time Conceptual understanding is key Life really sucks sometimes…how can I help? 5

6. Overview Personal Introduction Course Introduction Units Circuit Analysis Voltage & Current Basic Circuit Element Power & Energy 6

7. ENG17: Circuits 1 Electrical quantities and elements Resistive Circuits Transient and steady-state responses of RLC circuits Sinusoidal excitation and phasors Complex frequency and network functions Power Calculations 7

8. Course Structure TAs –Yuhao Liu (sub: Akash Anand) –Lu Cai –Chi Van Pham –Wu Yu –Xin Zhao Course Website is: –http://www.kmontgomery.net/eng17http://www.kmontgomery.net/eng17 Smartsite used primarily for grades Also using Piazza 8

9. Overview Personal Introduction Course Introduction Units Circuit Analysis Voltage & Current Basic Circuit Element Power & Energy 9

10. SI Units 10

11. Derived Units 11

12. Prefixes 12

13. Examples 13

14. Overview Personal Introduction Course Introduction Units Circuit Analysis Voltage & Current Basic Circuit Element Power & Energy 14

15. Big Picture Need justifies design Design specs filter to concept, circuit model, prototype Circuit analysis necessary for foundation 15

16. Overview Personal Introduction Course Introduction Units Circuit Analysis Voltage & Current Basic Circuit Element Power & Energy 16

17. Test Charge in a Field 17

18. Work & Energy 18

19. Electric Potential Energy 19

20. Voltage 20

21. Atom & Conductor in a Field 21

22. Current 22

23. Ohm’s Law 23

24. Water Analogy Water pressure = voltage Water flow = current 24

25. Overview Personal Introduction Course Introduction Units Circuit Analysis Voltage & Current Basic Circuit Element Power & Energy 25

26. Ideal Element 26 Passive sign convention

27. Fundamental Quantities 27 1.Voltage (v) 2.Current (i) 3.Charge (q) 4.Flux (Φ)

28. Overview Personal Introduction Course Introduction Units Circuit Analysis Voltage & Current Basic Circuit Element Power & Energy 28

29. Power ≠ Energy Power = Time Derivative of Energy UNITS! –Power in Watts –Energy in Watt-hrs or Joules Positive Power = Power Delivered to Circuit Negative Power = Power Extracted from Circuit 29

30. Recap Personal Introduction Course Introduction Units Circuit Analysis Voltage & Current Basic Circuit Element Power & Energy 30