نظام التعليم الالكتروني (ATU E-Learning System)

"Measurement” is the act of determining a target's size, length, weight, capacity, or other aspect. There are a number of terms similar to “measure” but which vary according to the purpose (such as “weight,” “calculate,” and “quantify.”) In general, measurement can be understood as one action within the term “instrumentation.”

The other discussion is concentrated at the generation of the magnetic field ant the magnetic force according to Lorentz's law. Then the other theories associated with are also discussed. 

Finally this subject discuss the matching between the electric field and the magnetic field to produce the electromagnetic field according to Maxweel's equations.