The resistance of a conductor increases for a given material at constant temperature when:

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Its thickness increases

Its length increases

Its length decreases and thickness increases

Its length increases and thickness decreases

answer is D.

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Detailed Solution

:
Concept: Conductor resistance is the term used to describe a conductor's inherent resistance to current flow. The more electrically conductive a substance is, the less resistance it offers to current passage. The conductor loses conductivity as current flow resistance increases.

R = ρ \frac{L}{A}

is the formula for the conductor's resistance.
We may thus claim that the following concepts impact a conductor's resistance:
the cross-sectional area of the conductor.
The length of the conductor.
Resistance of the conductor.
We can see that a conductor's resistance is directly associated with its length and inversely proportional to its cross-sectional area. As a result, the resistance of the conductor increases according to its length, thickness, or cross-sectional area.
Hence, the correct answer is option 4.

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