Ohm’s Law explains the relationship between voltage (V or E), current (I) and resistance (R)

Used by electricians, automotive technicians, stereo installers

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

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

 Resistance to the flow of the current. Measured in Ohms

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.

What is Voltage?What is Current?What is Resistance?

http://www.youtube.com/watch?v=eZ9Xk0Lln5Y&feature=related

Stop at 1 Min mark

V (E) = I x R

I = V R

R = V I

Battery voltage is 12VCurrent is Amp ?Resistance 2 Ohm

Voltage is 12VCurrent is 4 AmpsResistance Ohms ?

Multi meters/ DVOM

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.

Series circuit : One pathway for current to flow.Example: Old Christmas lights

More then one path way for current to flow.

Used in most electrical vehicle circuits.

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