Junior high school physics electricity to explore the factors affecting the size of conductor resistance The resistance is related to the material, length and cross-sectional area of the conductor. I want a metaphor to make me understand it better For example, the cross-sectional area of a conductor is the thickness of the conductor. It is compared to a road. A wide road is more unobstructed than a narrow road, so the resistance with a thick cross-sectional area is smaller, so the brightness of the light bulb is brighter. I don't know how to understand the other two factors. If there is a metaphor, I don't want to memorize it

Junior high school physics electricity to explore the factors affecting the size of conductor resistance The resistance is related to the material, length and cross-sectional area of the conductor. I want a metaphor to make me understand it better For example, the cross-sectional area of a conductor is the thickness of the conductor. It is compared to a road. A wide road is more unobstructed than a narrow road, so the resistance with a thick cross-sectional area is smaller, so the brightness of the light bulb is brighter. I don't know how to understand the other two factors. If there is a metaphor, I don't want to memorize it

The material of conductor means that the cement road is easier to walk and more unobstructed than the mountain road, so the resistance is related to the material of conductor
The length of conductor refers to that you run 10 laps on the playground, you run 5 laps on the same table (of course, you run much longer). It's easier for you to run on the same table than you, so the resistance is related to the length of conductor

The factors that determine the resistance
The resistance of a uniform straight wire is 12 ohm. What is the resistance of the wire folded in half and connected in the circuit
If you double it, what's its resistance
Fold 6 in half and lengthen 24. How can I pull it by mistake

The resistivity (which is determined by the material of the conductor and has nothing to do with anything else) the temperature cross-sectional area length has a formula
ρ=pl/s
P is the resistivity, l is the length, s is the cross section, and