A 2-meter copper conductor which has a cross-sectional area of 8 x 10 – 7 m2 has a potential energy difference of 6 volts between its ends. The resistivity of copper is 1.7 x 10 – 8 Ω-m. Find:
a. The resistance of the conductor, and
b. The current passing through it
"R = \\rho\\frac{L}{A}"
Where
R = is the resistance
"\\rho" = is the resistivity
L= is the length
A = is the cross sectional area
"R= 1.7\u00d710^{-8}\\Omega m[\\frac{2m}{8\u00d710^{-7}m^2}]"
"R=\\frac{3.4\u00d710^{-8}\\Omega m^2}{8\u00d710^{-7}m^2}"
"R= 0.0425\\Omega"
Current passing
"V= IR"
Where
V = is the potential
I = is the current
R = is the resistance
"I = \\frac{V}{R}"
"I =\\frac {6V}{0.0425\\Omega}= 14.11" amp
Comments
Leave a comment