There is a current in a metal wire due to the motion of...

Name: Problem 5, Chapter 19: Holt Physics
Uploaded: 2020-06-21T23:27:38-08:00
Duration: 30 s
Channel: Luis Rios
Description: There is a current in a metal wire due to the motion of electrons. Sketch a possible path for the motion of a single electron in this wire, the direction of the electric field vector, and the direction of conventional current.

There is a current in a metal wire due to the motion of electrons. Sketch a possible path for the motion of a single electron in this wire, the direction of the electric field vector, and the direction of conventional current.

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Key Concepts

Electric Field

An electric field is a vector field created by an electric potential difference (voltage) that exerts a force on charged particles. In a conducting wire, the electric field is directed from the higher potential (positive) to the lower potential (negative) end, and it acts as the driving force that causes electrons to drift through the material.

Conventional Current Direction

Conventional current is defined as the flow of positive charge. Although the actual charge carriers in a metal are electrons that move opposite to the electric field direction, the conventional current is taken to flow in the same direction as the electric field (from positive to negative). This concept is maintained for consistency in circuit analysis and design.

Electron Drift

In a metal conductor, free electrons move randomly due to thermal energy, but when an electric field is applied, they gain a slight net velocity opposite to the direction of the field. This slow, average movement of electrons in response to the applied electric field is known as electron drift, and it is responsible for the conduction of electric current in metals.

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