# Homework Help: OHM's Law-Explained to a 12yr old

1. Sep 20, 2006

### cupsmom

My 12 yrold is doing a report on Georg Ohm.. We have researched his life and have found the Ohm's LAw.. As much as we try to explain it to her in simple terms she doesnt understand it..(we are not knowledgeable in these subjects so we are probably not much help to her) Can anyone explain this simply to her? We appreciate it thank you very much

2. Sep 20, 2006

### Staff: Mentor

3. Sep 20, 2006

### tim_lou

use the analogy of a river. Resistance is like rocks and obstacles, potential difference is like the differience of height, current (the flow of electrons) is like the flow of water.

current is directly related to potential, similar to how when the height difference is great, more water flows through (faster rate). when there are obstacles, the water slow down, hence reducing the current...

4. Sep 20, 2006

### chroot

Staff Emeritus
If you push water through your showerhead with a greater pressure, more water will come out of it per unit time.

- Warren