Electron Flow Notion I would like to ask something that bothers me. A lot of us know of the electron flow notion, which it is the technical representation of how the electron charge really flows, starting from the negative side and flowing to the positive side, as opposed to the conventional flow notion by Benjamin Franklin with flow from positive to negative.
There are two things then I like to know regarding this:


*

*Is the ground (GND) the real electron reservoir? In a lightning strike, is the surface of the Earth then negative (-) and the cloud positive (+)?

*Do electronic devices for measurement and testing (multi-meters) use the electron flow notion?
 A: First of all, there is no need to worry over this.  The reason we can get away with using conventional flow even though electron flow is what is really happening is that the two are indistinguishable except for in some experiments that are really hard to do.
On to your questions.  The GND is not an "electron reservoir".  First of all, in most circuits there is not (or should not) be any charge flow in or out of GND.  When there is flow in or out of GND it could be in either direction (GND could be a source or sink of electrons).  In a typical circuit electrons flow out of a negative terminal (say of a battery) and into a positive terminal.
I'm not an expert on lightning, but my understanding is that the electron current is from the cloud to the ground.  In other words conventional current is from the ground to the cloud.  The cloud is negative, whether you are talking about conventional current or electron current.
Multimeters use conventional current.  This only affects the sign of the measurements they provide.
