Lesson: The Magnetic Field due to a Current in a Straight Wire Physics • Third Year of Secondary School

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In this lesson, we will learn how to calculate the magnetic field produced by a current in a straight wire.

Students will be able to

use the formula to find the magnitude of the magnetic field strength at a distance away from a long, straight wire carrying a current ,
recognize that the magnetic field strength due to a current-carrying wire is inversely proportional to the distance of a point from the wire: ,
use the right-hand rule to determine the direction of the magnetic field at a point due to a long, straight wire.