Lesson 8 - Uses of Electromagnets

Introduction

Why might we want to use an electromagnet rather than a permanent bar magnet? There are two obvious advantages to using electromagnets.

  1. They can be switched on and off. Complete an electric circuit and a current passes to produce a magnetic field. Switch off the current and the magnetism disappears.
  2. Also, their magnetic strength can be changed by:
    • increasing the number of coils (or turns) of wire.
    • increasing the electric current through the coil.
    • placing a magnetic material inside the solenoid coil.

Electromagnets

In your Science Journal:

    1. Write down today’s Lesson Title at the top of your next Journal page.
    2. Write today’s learning objective on the first line.
    3. Explore the Module 9 - Lesson 8 presentation below. Today, we’ll learn about the uses of electromagnets.  We’ll be exploring a Google Slides presentation about electromagnets and how humans use them.
    4. Write down the important terms and their definitions and important diagrams in your Science Journal.

 

Video

   Let's watch how Magnetic Resonance Imaging(MRI) machines work!

 

 

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