Modern devices probably have at least 10 times that resistance which makes the difference truly negligible. This is the basis of the four-wire, or Kelvin measurement.

While you may think a wire is a wire, they come in different materials and sizes, called gauges, and those can have different ...

The battery’s internal resistance develops a 0.5-Hz amplitude-modulated square-wave signal at the Kelvin connections attached to the battery. A synchronous demodulator comprising analog switches S 2 ...

In circuits connected in parallel, the components are connected on different branches. Find out more with BBC Bitesize. For students between the ages of 11 and 14.