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Potential Difference Between Two Points In an Electric Field - Current Density & Resistivity

This physics video tutorial explains how to calculate the potential difference between two points in an electric field on a metallic conductor. It also explains how to calculate the current density given the electric current and the diameter of the material. The current density is equal to the current divided by the cross sectional area. The electric field is equal to the resistivity of the material multiplied by the current density. The potential difference is the product of the electric field and the distance between the two points. This video contains plenty of examples and practice problems. Electric Current In Circuits:    • Electric Current & Circuits Explained, Ohm...   The Electric Battery:    • The Electric Battery and Conventional Curr...   Ohm's Law Problems:    • Ohm's Law Explained - Voltage, Current, Re...   Resistance and Resistivity:    • Resistivity and Resistance Formula, Conduc...   Resistor Color Code:    • Resistor Color Code Chart Tutorial Review ...   ______________________________ Internal Resistance of a Battery:    • Internal Resistance of a Battery, EMF, Cel...   Electromotive Force of a Battery:    • Electromotive Force of a Battery, Internal...   Drift Velocity and Current Density:    • Drift Velocity, Current Density, Number of...   Alternating Current Vs Direct Current:    • Alternating Current vs Direct Current - Rm...   ______________________________ Schematic Diagrams & Symbols:    • Schematic Diagrams & Symbols, Electrical C...   Open, Closed, and Short Circuits:    • Open Circuits, Closed Circuits & Short Cir...   Resistors In Series:    • Resistors In Series - The Easy Way!   Resistors In Parallel:    • Resistors In Parallel - The Easy Way!   Physics PDF Worksheets: https://www.video-tutor.net/physics-b...