HyperPhysics - Voltage

Engineering LibreTexts - Energy and Voltage

Wonderful tutorial go get a common-sense grasp of voltage.

Physics LibreTexts - Electromotive Force

Detailed well-illustrated tutorial that conveys the distinction between EMF and terminal voltage. Don't get lost in the weeds. The MCAT tends isn't usually too difficult about this stuff.

DC Current Resources

Integrated MCAT Course
The Integrated MCAT Course is a trademark of Wisebridge Learning Systems. Unless otherwise specified, the works of the Integrated Course are published under a Creative Commons Attribution NonCommercial ShareAlike License. MCAT is a registered trademark of the Association of American Medical Colleges, which does not endorse the Integrated MCAT Course. The Integrated MCAT Course offers our customers no guarantees regarding eventual performance on the MCAT.