Begin with a discussion on magnets and their everyday uses. Introduce the concept of electromagnets and how they differ from permanent magnets.
Go to the LessonLesson Plans
What Are Electromagnets?
Learning Objectives
- Understand how electric current creates a magnetic field and leads to the formation of electromagnets.
- Differentiate between electromagnets and permanent magnets, focusing on their ability to be turned on and off.
- Explain how the strength of an electromagnet can be adjusted by changing the number of wire coils.
- Identify and describe various applications of electromagnets in everyday appliances and devices.
- Recognize the importance of electromagnets in modern technology and their role in various fields such as medical imaging and audio equipment.
Introduction and Hook
Engage students with a quick demonstration of turning an electromagnet on and off to showcase its unique property.
Direct Instruction
Explain how electric current creates a magnetic field and leads to the formation of electromagnets. Discuss the components needed to build an electromagnet.
Use the video 'How to Make an Electromagnet' to visually demonstrate the process of creating an electromagnet using simple materials.
Guided Exploration
Explore the differences between electromagnets and permanent magnets, focusing on their ability to be turned on and off.
Watch the video 'Increasing the Strength of an Electromagnet – Number of Coils' to understand how the number of wire coils affects the strength of an electromagnet.
Hands-On Activity
Have students build their own electromagnets using batteries, wire, and nails. Encourage them to experiment with different numbers of coils to see the impact on magnetic strength.
Use the 'Electromagnet Challenge' assessment to guide students through designing and testing their electromagnets.
Independent Practice
Assign students to research and present on various applications of electromagnets in everyday appliances and devices.
Encourage students to document their findings in a report or presentation, focusing on the role of electromagnets in modern technology.
Check for Understanding
Conduct a class discussion to review key concepts, such as how electromagnets work and their applications.
Use the 'Electromagnets – Comprehension' assessment to evaluate students' understanding of the topic.
Review and Reflection
Have students reflect on what they learned about electromagnets and how their understanding has evolved.
Encourage students to think about how electromagnets impact their daily lives and the world around them.
Assessment and Extension
Administer the 'Review – Electricity and Circuits' assessment to test students' comprehension of the unit.
Try the Quiz
For further exploration, encourage students to investigate the role of electromagnets in advanced technologies like MRI machines and audio equipment.
