1. Chapter 6 Ohm’s Law, Work, Energy and Power

2. 16 V

3. 8 V

4. 1 V

5. 16 uV

6. 7 V

7. 20V

8. V = ? V I = 3 mA R = 2 k Ω 6V

9. V = ? V I = 5 nA R = 1.5 G Ω 7.5V

10. V = ? V I = 5 A R = 1.5 Ω 7.5V

11. V = 6 V I = 3 A R = ? Ω 2 Ohms

12. V = 6 V I = 3 A R = ? k Ω.002 kΩ

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14. Now Use your Calculator See page 92 in book Practice Problem 6.1 The answers to practice problems are at the end of the chapter

15. V = 6 V I = ? A R = 3 Ω Using your Calculator 2 Amps

16. V = 6 V I = ? mA R = 3 Ω Using your Calculator 2000 mA

17. V = 10 mV I = 2 mA R = ? Ω Using your Calculator 5 Ohms

18. V = 10 mV I = 2 mA R = ? m Ω Using your Calculator 5000 mOhms

19. V = 10 mV I = 2 mA R = ? M Ω Using your Calculator.000005 MOhms

20. V = 10 x 10 -4 V I = 2 mA R = ? M Ω Using your Calculator.0000005 MOhm 5 x 10^-7 MOhm

21. V = 10 x 10 -4 V I = 2 x 10 -3 A R = ? M Ω Using your Calculator.0000005 MOhm 5 x 10^-7 MOhm

22. Work What is work? Motion must take place for work to take place What is the unit for work? Joule (J) (This is also the same unit for Energy) Work takes place when electrical energy is converted to mechanical energy and vice versa What about electrical work? (no motion involved?) 1 Joule = Energy required to raise 1 Coulomb of charge through a potential difference of 1 Volt

23. Work What is the equation for work? W = Q * V Work = Charge * Voltage Joules = Coulombs * Volts

24. Power What is Power? Power is how much work can be done in a specific amount of time (Like MPH) Units for Power is Watts (W) (Like MPH) P = Work / Time

25. Power Equation for Power Power = Voltage * Current Power = Work / Time P = V * I Power = Q * V / Time Power = I * Time * V / Time Remember W = Q*V Remember I = Q/t Thus Q = I*t Power = I * V

26. Power See how Power also equals: P = V 2 /R P = I 2 * R

27. Power P = ? Watts I = 6 Amps V = 3 Volts P = V 2 /R P = I 2 * R P = V * I P = 18 Watts

28. Power P = 18 Watts I = 6 Amps V = 3 Volts P = V 2 /R P = I 2 * R P = V * I R = ? Ω R =.5 Ohms

29. Power P = ? Watts I = 5 Amps V = ? Volts P = V 2 /R P = I 2 * R P = V * I R = 10 Ohms P = 250 Watts V = 50 Volts

30. Power P = ? Watts V = 3 Volts P = V 2 /R P = I 2 * R P = V * I R = 9 Ω P = 1 Watts

31. Power P = 32 Watts P = V 2 /R P = I 2 * R P = V * I R = 2 Ω I = ? A I = 4 Amps

32. Power P = ? P = V 2 /R P = I 2 * R P = V * I I = ? P = 20W I = 2A

33. Power P = ? P = V 2 /R P = I 2 * R P = V * I R = ? P = 2W R = 50 Ohm

34. April 2014 0 - 426kWh 426 - 553kWh 553 – 851 kWh 851+ kWh 14¢ 19¢ 27¢ 31¢ Sept 2014 600kwHr = $107.57 600kwHr = $96.46

35. Oct 2014 600kwHr = $108