1. Module 4

1.2. In this Module

In This Module

Module 4—Magnetic and Electric Fields in Nature and Technology

 

In This Module

 

Lesson 1—Magnetic Fields

 

In this lesson you will explore the source and direction of the magnetic field produced by permanent bar magnets and moving charges. You will compare and contrast electric, gravitational, and magnetic fields.

  • What is a magnetic field?

  • How is Earth’s magnetic field produced?

  • What is the significance of a current-carrying conductor inducing a magnetic field?

Lesson 2—Moving Charges in Magnetic Fields

 

In this lesson you will explore the effects of uniform magnetic and electric fields on moving charges. You will also investigate the application of magnetic forces in modern technology.

  • How is moving charge affected by a magnetic field?

  • What variables determine the magnitude of the magnetic force?

  • How is the direction of the magnetic force determined?

Lesson 3—Electromagnetic Induction

 

In this lesson you will explore the interaction between an external magnetic field and a current-carrying conductor. You will see the application of these interactions in the conversion of mechanical energy into electrical energy and vice versa.

  • What is the nature of the magnetic force acting on a current-carrying conductor in an external magnetic field?

  • How are magnetic forces used in a direct current motor?

  • How is a current produced by an electric generator