The potential difference between the two grounds in this circuit can be determined(adsbygoogle = window.adsbygoogle || []).push({});

with the equation

AB = X + Z

where z is the voltage source and x is the node at the top of the circuit, and AB

is the potential difference between the two grounds.

Could someone please explain to me why this is the case?

http://img31.imageshack.us/img31/1401/circuity.jpg [Broken]

Uploaded with ImageShack.us

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Voltage across an open circuit

**Physics Forums | Science Articles, Homework Help, Discussion**