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.