The resistance of a conductor depends on its length (l), area of cross-section (A), nature of material, and temperature. It increases with length, decreases with thickness, and varies with the type and temperature of the material.
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The resistance of a conductor is influenced by several factors. It increases with the length of the conductor and decreases with the area of cross-section. It also depends on the nature of the material—metals like copper and aluminium have low resistance, while alloys like nichrome have high resistance. Temperature also affects resistance; in most metals, resistance increases with rise in temperature. Thus, resistance (R) can be expressed as R = ρ(l/A), where ρ is the resistivity of the material.