Micro-addition to the previous note “Magneto-electric resistance, as it is!”

Like any law, Ohm’s law for a section of a circuit or a complete ciruit DOES NOT EXPLAIN ANYTHING, but only states a certain repeatedly recurring phenomenon.

Let’s take a circuit made up of elements with different conductivity, ie. different resistance.

We will apply a potential difference to its ends and measure the voltage drops in different sections. Where the resistance is low, the voltage drop is also low. Where the resistance is large, there is a large voltage drop.

Ohm’s Law!

But what are we talking about in terms of physical processes?

About the same thing: In order for a small number of generalized electrons (generated by any reason, narrowing of the conductor cross-section or high resistivity) in a section with high resistance to produce the same current as in sections with low resistance, the charges must move FASTER! But generalized electrons can only drift faster under the influence of a higher field strength. And there, there is just a greater voltage drop, that is, a greater electric field strength.

As you can see, everything fits!

This again underlines the importance of such a parameter as the MOBILITY of CHARGES, that is, the “specific” increment (plus or minus) of their velocity per unit of applied voltage.

It is the MOBILITY of charges that varies for different resistance sections of the circuit, and IT IS THIS DIFFERENCE AT the ATOMIC LEVEL (in the interaction of localized magnetic fields of electrons drifting rapidly or slowly along the outer orbits of metal atoms with the magnetic fields of the atoms themselves) that explains many “contact phenomena”, including the Seebeck and Peltier effects.

Faciant meliora potentes.

3 XI 2026