Ages

Introduction

Summary

Do not confuse instantaneous velocity (thermal agitation in km/s) and mean velocity of free moving charges (conduction current in mm/s).The resistance of a conductor stems from the numerous collisions taking place in it. These collisions are also at the origin of the heating effects known as the “Joule Effect”.
By convention, current moves from the positive pole to the negative pole. The electrons move in the opposite direction.

Goals

• Point out the conditions to observe a circulating current in a circuit.
• Display the microscopic meaning of electric current and resistance.

Features

Click on the connectors to switch them on/off. 

Tags

thermal-agitation current electron circuit electricity resistance resistivity conductivity