Question

TUTORIAL:

Below,
Have fun.

Answer 1

Tutorial requested by @hba
Subject: Physics
Topic: Eddy Currents & Lenz's Law
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Take a none-magnetic, but electrically conductive pipe of copper, and drop a magnetic inside. When you do this something very interesting happens. First the magnetic will very slow, and instead of hitting the ground in half a second; it'll actually take about seven seconds more. You may say, "Oh the copper pipe must also be magnetic, making the magnetic falling go slower because it's putting an opposite force upon it." There is only one problem; the copper pipe is not magnetic. The new question is, "Well, what is making it fall slower?"


Too understand this, we must first understand Lenz's Law, which states, "An electromagnetic field interacting with a conductor will generate electrical current that induces a counter magnetic field that opposes the magnetic field generating the current.."

Basically a magnetic can produce it's own magnetic force that is opposite too it, thus, making a force push against it. An example would be if you dropped a magnetic producing a positive force; it'll produce a negative force pushing against it, and vice-versa.
VIEW THIS IMAGE BELOW:


You can see that it creates a positive and negative force all by itself. With each force acting against each other making it fall slower.





The only issue is that while the magnetic falls; there is a sound as if it was clanking against the sides of the copper pipe, but upon further research scientist found out that the magnetic never touches the copper pipe. So what was making this sound? Well it's called an Eddy Current, and once you understand this you will understand HOW the opposite magnetic force is created. Because scientist knew that it DID fall slower because of an opposite magnetic force, the new question was HOW.


You see, those magnetic forces have there own magnetic force, and that magnetic force is called an Eddy Current. Did I just confuse you? Good. Allow me too draw you a visual:
VIEW IMAGE BELOW:

You see that inside the copper pipe there is a magnetic force, and inside that magnetic force there was Eddy Currents. These Eddy Currents rub against the pipe making it slow down and exerting an opposite force. You may say,"So it's friction and not a magnetic force slowing it down?" Ehhnn, wrong again. This is purely the magic of magnetism at work.

So what did we learn today?

1. Magnets take longer to fall in none-magnetized electrical metals.
2. Magnets fall slower because an opposite magnetic force acts upon it.
3. This magnetic force is created by Eddy Currents.
4. Eddy Currents are responsible for slowing down magnetic objects.




Regards,
Stephen Kent.