Chegg A 14.0 gauge copper wire of diameter 1.628 mm carries a current of 13.5 mA . What is the potential difference across a 1.95 m length of the wire

Explanation:

Given data

Diameter d=1.628 mm=1.628×10⁻³m

Current I=13.5 mA=13.5×10⁻³A

The Cross-sectional  Area is given as:

The potential difference across a 1.95 m length of 14-gauge copper wire

Length L=1.95 m

Copper Resistivity p=1.72×10⁻⁸Ω.m

The Resistance of copper wire is given by:

R=0.01612Ω

The Potential difference across the copper wire is:

the answer is b, have negligible mass