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Video. http://www.youtube.com/watch?v=E27XDNf2cxc. OHMS LAW. What is ohms law?. Ohm’s Law explains the relationship between voltage (V or E), current (I) and resistance (R) Used by electricians, automotive technicians, stereo installers. VOLTAGE (V).

sebastian-sykes
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  1. Video http://www.youtube.com/watch?v=E27XDNf2cxc

  2. OHMS LAW

  3. What is ohms law? • Ohm’s Law explains the relationship between voltage (V or E), current (I) and resistance (R) • Used by electricians, automotive technicians, stereo installers

  4. VOLTAGE (V) • It is the push or pressure behind current flow through a circuit, and is measured in (V) volts. 

  5. CURRENT • Current refers to the quantity/volume of electrical flow. Measured in Amps (A)

  6. RESISTANCE • Resistance to the flow of the current. Measured in Ohms

  7. Chart

  8. General Rule. • 1.  Assuming the resistance does not change: As voltage increases, current increases. as voltage decreases, current decreases. • 2.  Assuming the voltage does not change: • As resistance increases, current decreases. • As resistance decreases, current increases.

  9. RECAP!! • What is Voltage? • What is Current? • What is Resistance?

  10. Part 2 • http://www.youtube.com/watch?v=eZ9Xk0Lln5Y&feature=related • Stop at 1 Min mark

  11. How do we used Ohms law

  12. V (E) = I x R • I = V R R = V I

  13. How do calculate? • Battery voltage is 12V • Current is Amp ? • Resistance 2 Ohm

  14. How to calculate? • Voltage is 12V • Current is 4 Amps • Resistance Ohms ?

  15. What can we use to measure? Multi meters/ DVOM

  16. Resistors • Why do we need resistors • To decrease the amount of voltage applied to a component • The value of the resistor is marked on the body using coloured rings

  17. Resistors

  18. Resistor color chart

  19. RECAP!! • What is Voltage? • What is Current? • What is Resistance? http://www.youtube.com/watch?v=nj7ewZmG3eo&feature=related

  20. Part 3 • http://www.youtube.com/watch?v=YB_JCUw9SoU&feature=related

  21. Load • What is a load • It is a any electric load on a circuit that does work. • Example: Power windows, light bulbs, motors.

  22. Different types of circuit • Series circuit : • One pathway for current to flow. • Example: Old Christmas lights

  23. Parallel Circuit • More then one path way for current to flow. • Used in most electrical vehicle circuits.

  24. Series and Parallel Circuits 12

  25. Parallel resistance circuit

  26. What it looks like

  27. 1997 Headlight circuit

  28. RECAP!! • What is Voltage? • What is Current? • What is Resistance? • What are wiring diagrams? • What are the different circuits and there characteristics?

  29. QUIZ

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