With frequent editing in study material, a need for versioning in file names is being felt so that students just by looking at the file name can check if they have the latest version of the study material or an older version. Today, version 3.0 on Capacitors in published and the file name has the suffix 3.0. When this file is published again due to updates then its name can have the appropriate suffix (say, 3.1 for example).

Incidentally, the file on Capacitors provides an extensive proof of what is referred to as look alike of Wheatstone bridge in resistive network.