A thin rectangular film resistor is long

PHYSICS · Single correct · CBSE · Physics · Current Electricity · Current Electricity

Problem

A thin rectangular film resistor is

2.0\,\text{cm}

long,

5.0\,\text{mm}

wide, and

0.10\,\text{mm}

thick. Its measured resistance at room temperature is

2.4\,\Omega

. Using the data below, which material is MOST consistent with the measurement? Material-Resistivity (

\Omega\cdot\text{m}

20\,^\circ\text{C}

) (a) Manganin,

4.4\times10^{-7}\,\Omega\cdot\text{m}

(b) Graphite,

3.5\times10^{-5}\,\Omega\cdot\text{m}

2.82\times10^{-8}\,\Omega\cdot\text{m}

(d) Tungsten,

5.6\times10^{-8}\,\Omega\cdot\text{m}