Physics

Problem

An aluminum ribbon conductor is

2.0\,\text{mm}

wide and

0.10\,\text{mm}

thick. When connected to a

12\,\text{V}

power supply it carries a steady current of

8.0\,\text{A}

. Approximately how long is the ribbon? (Resistivity of aluminum

= 2.8\times10^{-8}\,\Omega\!\cdot\!\text{m}

.) a)

110\,\text{m}

4.9\,\text{m}

11\,\text{m}

1.1\,\text{m}