Many introductory books on electricity try to relate voltage to water pressure, electric current to water flow, and resistance to changes in pipe volume.

This has come to be known as conventional current flow. Then in 1897, British physicist Thompson, discovered that current flow was really electrons as he was doing some research on a crt.

Advanced Auto-Qualified Current-Shunt Monitors Addressing these needs, Diodes Inc. introduced the ZXCT18xQ series of automotive-compliant, high-precision current-shunt monitors (see figure).