Vernier Software and Technology
Vernier Software & Technology

Exploring Faraday's Law


In 1820, Hans Christian Oersted observed that electric currents create magnetic fields. Consequently many scientists made unsuccessful attempts to create current in the presence of magnetic fields. After over 10 years of investigation Michael Faraday and Joseph Henry, working independently on different sides of the Atlantic, made the discovery that if a conducting coil has a changing magnetic flux passing through it an electromotive force is created that causes a current to flow through the coil. The equation describing this phenomenon quantitatively is known as Faraday’s Law.


In this activity, you will

  • Use Faraday’s Law to explain why the current induced in a coil (and thus the voltage) across it changes the way it does when the north or south pole of a rod shaped magnet is moved into and then back out of the center of a coil of wire at various speeds.

Software for Experiment

This experiment uses Logger Pro software for video analysis. The video for analysis is included with the lab book.

Experiment 32 from Physics with Video Analysis Lab Book

<em>Physics with Video Analysis</em> book cover

Included in the Lab Book

Vernier lab books include word-processing files of the student instructions, essential teacher information, suggested answers, sample data and graphs, and more.

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