# Lesson Plan: The Magnetic Field due to a Current in a Circular Loop of Wire Physics

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to calculate the magnetic field produced by a current in a circular loop of wire.

#### Objectives

Students will be able to

- use the formula to find the magnitude of the magnetic field strength at the center of a current-carrying loop of radius ,
- use for many loops,
- recognize that as the radius of the loop gets larger, the magnetic field strength at the center gets weaker,
- use the right-hand screw rule to determine the direction of the magnetic field through the loop.

#### Prerequisites

Students should already be familiar with

- the idea that current-carrying wires produce magnetic fields.

#### Exclusions

Students will not cover

- other geometries (e.g., straight wire, rectangular wire),
- the vector forms of this formula.