Unit 5: Magnetic Forces and Magnetic Fields

Introduction to Unit 5

Everybody uses magnetic forces. Magnetic forces are involved in electric motors and generators, TV, microwave ovens, computer printers, disk drivers, and others. Without magnetic fields, we wouldn’t even see, as the light itself results from an interaction between magnetism and electricity. The most familiar aspects of magnetism are those associated with permanent magnets, which unmagnetized iron objects and can also attract or repel other magnets.  This section examines the forces that act on moving charges and on current-carrying wires in the presence of magnetic fields.

Intended Learning Outcomes

Having successfully completed this section, you should be able to

• Describe the fundamental nature of magnetism and its relation to electric charge;
• Understand the interaction between magnetism and electricity and use it to calculate magnetic forces on electric currents;
• Explain the relation between the magnetic field and magnetic force;
• Calculate the motion of charged particles in magnetic fields.

Learning Activities

E-tivity 5.1: Read the attached handouts

E-tivity 5.2: 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 5.3: After reading the handouts attached under this unit, attempt the questions of the quiz