How does an electrical switch work? How can you demonstrate the presence of a magnetic field? What effect does a magnetic field have on current? Using easy-to-find materials and the scientific method, you can learn the answers to these questions and more. If you are interested in competing in science fairs, the book contains lots of great suggestions and ideas for further experiments.
How does an electrical switch work? How can you demonstrate the presence of a magnetic field? What effect does a magnetic field have on current? Using easy-to-find materials and the scientific method, you can learn the answers to these questions and more. If you are interested in competing in science fairs, the book contains lots of great suggestions and ideas for further experiments.
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