Changes

The [[Terminal Voltage|terminal voltage]] of an [[Electrical Cell|electrical cell]] or [[battery]] is related to '''emf''' by the following formula:

Where:

*𝑉 is the [[Terminal voltage|terminal voltage]]

*𝐼 is the [[Electrical Current|current]] through between the terminals

*𝑟 is the [[Internal Resistance|internal resistance]] of the [[Power Supply|power supply]]