Lesson: Electrical Conductivity and ResistivityPhysics
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
A potential difference of V is applied across a wire of length 10.0 m and diameter 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 piece of copper wire with length 20.0 m and diameter 2.053 mm. Use a value of Ω⋅m for the resistivity of copper.