I want to learn the basics about electricity?

I am a junior in high school and want to learn more about electricity. I originally wanted to know this so i could work on the wiring in my house or in a car and also so i could understand or even build electric motors. For now i just want to know the basics for example the difference between Thomas Edison's work and Nicolas Tesla's. if anyone can recommend a book or someplace on the internet where i could fins this information that would be great.

"Basic Electronics" by Bernard Grob is supposedly available for free download. If not, a used copy costs a couple of bucks on Amazon (plus shipping).

Learning the difference between Tesla's approach and Edison's approach will not give you any knowledge of the basics of electricity.

I usually find howstuffworks to be very entertaining and infomative on these items. They have a special page on electricity, Voltage, Current and Resistance .

On the definitions of amps, watts, volts and ohms:
http://science.howstuffworks.com/questio...
The three most basic units in electricity are voltage (V), current (I, uppercase "i") and resistance (r). Voltage is measured in volts, current is measured in amps and resistance is measured in ohms.

A neat analogy to help understand these terms is a system of plumbing pipes. The voltage is equivalent to the water pressure, the current is equivalent to the flow rate, and the resistance is like the pipe size.

There is a basic equation in electrical engineering that states how the three terms relate. It says that the current is equal to the voltage divided by the resistance.

I = V/r

Let's see how this relation applies to the plumbing system. Let's say you have a tank of pressurized water connected to a hose that you are using to water the garden.

What happens if you increase the pressure in the tank? You probably can guess that this makes more water come out of the hose. The same is true of an electrical system: Increasing the voltage will make more current flow.