logo

Video encyclopedia

Voltage

3:43

Physical Properties and Chemical Properties | Properties of Matter | Chemistry

3:32

Voltage

3:44

Periodic Properties and Light Emitting Diodes

3:01

Science Grade 8 Current and Voltage Part 2

2:00

PG&E Teaches Linemen How to Work on Energized Power Lines

Voltage, electric potential difference, electric pressure or electric tension is the difference in electric potential between two points. The voltage between two points is equal to the work done per unit of charge against a static electric field to move a test charge between two points. This is measured in units of volts ; moving 1 coulomb of charge across 1 volt of electric potential requires 1 joule of work.
  • Definition 

  • Volt 

  • Hydraulic analogy 

  • Applications 

  • Measuring instruments 

  • Typical voltages 

  • Galvani potential vs. electrochemical potential 

  • History