PH-1075

Resistance

Physics · Secondary 4 · Medium · Resistance

A metal wire of length 5.0 m has a resistance of

10\,\Omega

. A second wire is made of the same material but has twice the length and three times the cross-sectional area. What is the resistance of the second wire?

$6.7\,\Omega$
$5.0\,\Omega$
$15\,\Omega$
$20\,\Omega$

Loading problem…