http://www.ck12.org Chapter 25. Electromagnetism
Apply Concepts
- Create a sketch to show how a coil of wire in a circuit and a bar magnet can be used to produce electric current.
Think Critically
- Explain how an electric transformer changes the voltage of electric current. Why does a transformer work
only with alternating current?
Points to Consider
This chapter explains how electric and magnetic forces are related and how they are used. Knowledge of electricity
and magnetism can help you understand the electric devices you use in your daily life. In many other ways,
knowledge of physical science can help you understand your natural and human-made environment.
- What have you learned by studying physical science that helps you understand the world around you?
- What else would you like to learn?