Ohms law
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Transcript of 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
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.
http://www.youtube.com/watch?v=eZ9Xk0Lln5Y&feature=related
Stop at 1 Min mark
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
What is Voltage?What is Current?What is Resistance?
http://www.youtube.com/watch?v=nj7ewZmG3eo&feature=related
http://www.youtube.com/watch?v=YB_JCUw9SoU&feature=related
What is a loadIt is a any electric load on a circuit that does work.
Example: Power windows, light bulbs, motors.