Isaac you're so incompetent!

Johnny: Seriously, you're a spanner. You have just proven to the whole forum you have no grasp of the most basic physics/electronics principles. I'd expect any AS level physics student to be able to answer those questions. You clearly have no idea about Ohms Law and didn't explain anything with it.

Can I suggest you get yourself a science book from the library, one of those nice ones with lots of pictures, and perhaps a dictionary to look up the definition of dependant.