Voltage terminology in plain english

Ha, let me try using my lousy English:

(1) Never mind the two long wires first, but focus at the two battery terminals. (2) Now when we say eg, the battery has a voltage of 1.5V, then the following is happening:

a huge number of electrons crowd at the negative terminal of the battery.

Actually what is happening (appearing, occurring, existing, …) can be very accurately described, as follows:

(3) Every electron has a very very small negative “charge” which can be measured in units of “Coulumbs”.

(4) How accurate to measure is not important to understand the idea/concept of electric charge which causes attraction or repulsion.

(5) A rough/bad analogy is the “height” of a person. When we say the person is “tall”, we don’t really need a ruler to understand what is the meaning of height.

(6) But if you have an “electronic microscope”, I think you can see the little electron guys crowded at one battery terminal, and very few guy at the positive terminal.

(7) Now if you connect the two battery terminals by conducting wires, electrons do propagate (flow) from the negative battery terminal to the positive terminal. This flow of electrons is called electric current and can also be accurately measure in units of “Ampere” which is a certain number of Coulumbs (electrons) per second.

Again, never mind the names of the units, what is important is that real things do exist/occur, and we can very, very accurately measured it.

Voltage terminology in plain english

and those comments are effectively small answers:

Ha, let me try using my lousy English: (1) Never mind the two long wires first, but focus at the two battery terminals. (2) Now when we say eg, the battery has a voltage of 1.5V, then the following is happening: a huge number of electrons crowd at the negative terminal of the battery.

Actually what is happening (appearing, occurring, existing, …) can be very accurately described, as follows: (3) Every electron has a very very small negative “charge” which can be measured in units of “Coulumbs”. (4) How accurate to measure is not important to understand the idea/concept of electric charge which causes attraction or repulsion. (5) A rough/bad analogy is the “height” of a person. When we say the person is “tall”, we don’t really need a ruler to understand what is the meaning of height.

(6) But if you have an “electronic microscope”, I think you can see the little electron guys crowded at one battery terminal, and very few guy at the positive terminal.

(7) Now if you connect the two battery terminals by conducting wires, electrons do propagate (flow) from the negative battery terminal to the positive terminal. This flow of electrons is called electric current and can also be accurately measure in units of “Ampere” which is a certain number of Coulumbs (electrons) per second. Again, never mind the names of the units, what is important is that real things do exist/occur, and we can very, very accurately measured it.