How Everything Works
How Everything Works How Everything Works
 

QUESTIONS AND ANSWERS
 
Question 248

What is the difference between current and voltage?
Current is the measure of how many charges are flowing through a wire each second. A 1-ampere current involves the movement of 1 Coulomb of charge (6,250,000,000,000,000,000 elementary charges) per second. Voltage is the measure of how much energy each charge has. A 1-volt charge carries 1 Joule of energy per Coulomb of charge. To use water in a pipe as an analogy, current measures the amount of water flowing through the pipe and voltage measures the pressure (or energy per liter) of that water.
         

Copyright 1997-2017 © Louis A. Bloomfield, All Rights Reserved
Privacy Policy