Under the same voltage, the greater the current passing through the conductor, the smaller the resistance of the conductor. However, the resistance of the conductor has nothing to do with the voltage at both ends of the conductor and the current passing through it Two sentences are negative contradictions

Under the same voltage, the greater the current passing through the conductor, the smaller the resistance of the conductor. However, the resistance of the conductor has nothing to do with the voltage at both ends of the conductor and the current passing through it Two sentences are negative contradictions

There is no contradiction. The resistance of an object is fixed (unless the shape, size, loss, etc. are changed),
So the resistance has nothing to do with the external conditions
The first sentence is right, because when u is the same, of course, the greater the current, the smaller the resistance (U = IR)

The relationship between conductivity and resistivity?

Conductance s and resistance R are reciprocal
R=1/S
Conductivity describes the strength of conductivity,
Resistance describes the ability to block the flow of electrons
Resistance R = ρ * L / s, where ρ is resistivity, l is conductor length and S is conductor cross-sectional area
Resistivity ρ and conductivity are reciprocal, equal to 1 / ρ

Why is the resistivity of conductive medium much higher than that of electrode in simulated electrostatic field

In the experiment of simulating electrostatic field, we need to understand the meaning of simulation, that is, to simulate electrostatic field with constant current field. Conductive paper is the resistance in the circuit, and the electrode plays a fixed role. If the electrode current is greater than the resistance of conductive paper, it will have the taste of crowding over the guests, regardless of the primary and secondary

Resistivity and conductivity of ordinary steel

Conductive materials usually refer to metals with resistivity of (1.5-10) × 10-8 ohm