Science Buddies: "Ask an Expert"

I am running a battery test for my science fair experiment. need help understanding Ohm's Law i a simplified mannor. I also need a couple of practice problems to present to the judges. The project is due febuary 1st.

Hi hutchiekid6

Ohms law is the main basic electrical equation. It defines the resistance of a device to the flow of electrons. Ohm's law is written E=I*R, where E is the voltage in volts, I is current measured in amps (amperes) and R is the circuit’s resistance measured in ohms. With an elementary knowledge of algebraic equations, Ohms law can be used to find any one of the three variables when given values for the other two. Here are several good web pages that may help you better understand the use of the law.

NASA's Learning Technologies Project provides some easy to understand examples at
http://www.grc.nasa.gov/WWW/K-12/Sample ... mslaw.html

Circuit-magic.com gives a visual representation of the Ohms Law and how its used at
http://www.circuit-magic.com/ohms_law.htm