Resistors

Resistance, in terms of physical dimensions:

R = \frac{\rho l}{A}

Here:

$l$: length
$A$: cross-sectional area
$\rho$: resistivity

If a voltage $V$ is applied across a conductor, then a given current $I$ will flow through the conductor $V \propto I$ . The proportionality constant is called resistance $R$ .

R = \frac{V}{I}

Written by

Sahithyan K.

November 3, 2026 1 min read

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