Resistance of a conductor is directly proportional to

A. Length
B. Cross-Sectional Area
C. Magnetic Field
D. N.O.T

Answer

A. Length

The resistance of a conductor is directly proportional to its length and inversely proportional to its cross-sectional area. This relationship is described by the formula:

$R = A ρ \cdot L$

Where:

$R$ is the resistance,
$ρ$ is the resistivity of the material,
$L$ is the length of the conductor, and
$A$ is the cross-sectional area of the conductor.

So, the correct answer is:

A. Length

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