Unit 6: Sources of Magnetic Fields

Introduction to Unit 6

In the previous section, we discussed the magnetic force exerted on a charged particle moving in a magnetic field. To complete the discussion on the magnetic interaction, this section explored the origin of the magnetic fields. We begin our study with the Biot-Savart law and its applications. Then, we will introduce Ampere’s law, which plays a role in magnetism analogous to the role of Gauss’s law in electrostatics. Before discussing the behavior of magnetic fields in some materials, we will discuss the magnetic fields generated by some current structures, and illustrate the Gauss’s law in magnetism.

Intended Learning Outcomes

Having successfully completed this section, you should be able to

• Understand the Biot-Savart law and use it to describe the magnetic field produced by current-carrying wire for various geometries;
• Demonstrate knowledge on nature magnetic fields produced by a single moving charged particle;
• Quantitatively explain the origin of interaction between current-carrying wires;
• Use the Ampere’s law to calculate the magnetic field of the symmetric current distribution
• Interpret Gauss’s law for the magnetic field.

Learning Activities

E-tivity 6.1: Read the attached handouts

E-tivity 6.2: Post any question or challenge you faced while reading the handouts. You are also invited to react on posted topics by your colleague(s) or by e-moderator(s)

E-tivity 6.3: After reading the handouts attached under this unit, attempt the questions of the quiz