Faraday's Law Demo: Induction Coils

This is a demonstration of Faraday's law using a galvanometer, a bar magnet, and three induction coils. Changing the magnetic flux through a coil induces an emf and a current in the coil, which is shown by the galvanometer. The larger the number of turns in the coil, the greater the current.

This demonstration was created at Utah State University by Professor Boyd F. Edwards, assisted by James Coburn (demonstration specialist), David Evans (videography), and Rebecca Whitney (closed captions), with support from Jan Sojka, Physics Department Head, and Robert Wagner, Executive Vice Provost and Dean of Academic and Instructional Services.

[jackielynrarama]

Such a helpful video to understand better the Faraday's law.. Thanks!

[This_truly_is_evil_era]

Sir why is emf generated in the coil !?

[jacquesdaze]

Explain polarity of 4 coils when magnet moves across all 4

[zack]

Isn't it better to think of it as a current source then? Why V = - d phi/dt?

[anthonypape]

Why does every video move a magnet into a coil and then out to demonstrate Faradays law while all generators use magnets that pass by the coils? Or more specifically all things being equal is more voltage generated moving a magnet into a coil and then out or to have it pass by the coil?

[GoodSirB]

Bruh what would happen if you had a circular coil and magnet in space and the magnet would move at high speeds through the coil? Surely this doesn't work to create limitless voltage but what would happen?

[ganeshramamurthi]

Professor, There seems to be a zero error in the meter or is it a parallax error?

[KnightPassions]

What is the maximal number of Volts more or less what you can create this way?

[muhammadhussainsarhandi]

@Physics Demos this is very nice video to understand Faraday-Lenz Law, can you please tell me where to buy those induction coils?

[kapildev]

sir i have doubt if increase the number turns of the coil whether the voltage increases or amps rate increases?

[thoththeatlantis]

is this amp meter or mili amp or micro amp?