The resistance of a conductor is directly proportional to the voltage at both ends of the conductor and inversely proportional to the current passing through the conductor Why wrong? How to understand the relationship between resistance, voltage and current? Don't use books. It's suitable for multiple choice questions

Resistance is the property of conductor itself. It is only related to the material, cross-sectional area, length and other factors. It is not affected by the current passing through it and the voltage sandwiched between its two sides. Therefore, the resistance of conductor is directly proportional to the voltage at both ends of conductor, and the resistance of conductor is inversely proportional to the current passing through conductor

The relationship between voltage, current and resistance is studied
In the study of the relationship between current and resistance, a 5 ohm constant resistance is used to test, so that the indication of voltmeter is 3V. When a 10 ohm constant resistance is used, a student does not change the position of slide plate of sliding rheostat. After closing the switch, the indication of voltage will decrease___ 3V [greater than or less than or equal to] [increase or decrease], so that the voltage representation is still 3V

The first answer is greater than 3V, the resistance increases, the partial voltage is more. The second answer is larger, because the proportion of partial voltage in the two cases is the same, both increase and decrease

Explore the relationship between current and voltage on resistance
Let's see which of the following guesses is correct
A: The greater the voltage applied to both ends of the resistor, the smaller the current passing through
B: The greater the voltage applied to both ends of the resistor, the greater the current passing through
C: As the voltage applied to both ends of the resistor increases, the current passing through it remains unchanged
In order to make the above guess, what is the measuring instrument needed?
When designing the experiment, we need to change the voltage. What method should be used in the experiment?

I=V/R
V changes, R does not change
So choose B
Resistance box
ammeter
voltmeter
control variable

Explore the image of "the relationship between the current on the resistance and the voltage at both ends"
According to the experimental record of "exploring the relationship between the current on the resistance and the voltage at both ends", the image drawn should be the image of the current changing with the voltage, that is, the I-U relationship image. The voltage U is the independent variable (expressed in abscissa) and I is the dependent variable (expressed in ordinate). But the description and image name in the textbook are all "U-I relationship image". Why? How to explain?
Shouldn't the causality be explained when the current changes with the voltage?

The function of I with respect to u is the inverse of the function of u with respect to I. the angle bisector of the two images with respect to the first quadrant is symmetric
It's causality, but which comes first and which comes later doesn't affect causality

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