Lesson: Electrical Conductivity and Resistivity
In this lesson, we will learn how to calculate the electrical resistance of a material given its resistivity, cross-sectional area, and length.
Sample Question Videos
Worksheet: 12 Questions • 3 Videos
A V potential difference is applied across a 10.0-m length of wire with a diameter of 4.621 mm. The magnitude of the current density produced is A/m2. What is the resistivity of the wire?
What is the resistivity of a 5-gauge wire (cross-sectional area of m2) of 5.00 m length, and 5.00 Ω resistance?
Find the resistance of a 20.0-m-long piece of copper wire that has a 2.053-mm diameter. Use a value of Ω⋅m for the resistivity of copper.