Variac, coil with core, multimeter, split rings

Code Number: 5K30.51

Demo Title: Induced EMF

Condition: Excellent

Principle: Mutual Induction, Induced EMF

Area of Study: Electricity & Magnetism

Equipment:

Variac, coil with core, multimeter, split rings or long banana cords.

Procedure:

Connect the coil to the Variac. Turn the Variac up to 30 or 40 and loop a single or multiple turns of the wire around the iron core. Observe the voltage reading on the multimeter.

The wire may be replaced with one of the available split rings. Connect the meter across the gap with alligator clips and observe the reading with the multimeter.

References:

B-260, "Ring - Jumping and Heating", DICK and Rae Physics Demo Notebook.

Disclaimer

These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist. The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose. The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources. Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks. These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage. Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.

Instructional Resources and Lecture Demonstrations

5K30.51 - Induced EMF

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