Question

A WIRE CARRIES A CURRENT OF 0 1A AND HAS A RESISTANCE OF 120 MILLIOHM PER METER.WHAT IS THE POTTENTIAL DIFFERENCE ACROSS 1 M THE WIRE?

Answer 1

Given that,

Current = 0.1 A

Resistance of 1 m wire = 120 mΩ

We need to calculate the potential difference across 1 m wire

Using formula of potential

$V=IR$

Where, I = current

R = resistance

Put the value into the formula

$V=0.1\times120\times10^{-3}$

$V=0.012\ Volt$

$V=12\ mV$

Hence, The potential difference across 1 m wire is 12 mV.