Electromagnetism : Current Induction

[nk_annisa]

Homework Statement

that fig is taken from the book of The Feynman Lectures on Physics. The fig above shows that if the copper disc is rotated (by a hand), there will be induced current, measured by the galvanometer. this engineering principle is the basic principle of a generator. what would happen if the situation changed? so now the bar magnet is the one that rotated (relative to the axis of the magnetic poles: NS). is there still any induced current measured by the galvanometer?

Homework Equations

The Attempt at a Solution

I know nothing

 

[KataKoniK]

Hello,

Thank you for your post. I can provide some insight into your question about the induced current in the situation where the bar magnet is rotated instead of the copper disc.

First, let's review the basic principle of a generator. As shown in the figure from The Feynman Lectures on Physics, when the copper disc is rotated, there is a change in the magnetic field passing through the disc. This change in magnetic field induces a current in the disc, which can be measured by the galvanometer. This process is known as electromagnetic induction.

Now, if we change the situation and rotate the bar magnet instead, there will still be a change in the magnetic field passing through the disc. This change in magnetic field will still induce a current in the disc, which can still be measured by the galvanometer. The direction of the induced current will depend on the direction of rotation of the bar magnet and the orientation of the disc.

In summary, the basic principle of a generator remains the same regardless of whether the copper disc or the bar magnet is rotated. Both situations will result in a change in the magnetic field and induce a current in the disc. I hope this helps to answer your question. Let me know if you have any further doubts or questions.