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I spent a long time just trying to find the right equation and it was no surprise that I did not understand a variable of it.

Why is it that a tower of identical disc magnets behaves differently (is stronger than?) a single magnet.

Known: NO NUMBERS

Each disk is identical in every shape and form

This is the equation I found:

I figured that as more and more discs are attached 'L' increases, as it gets longer, however this causes the Flux density at x (B

Thank you for your help.

**1. Homework Statement**Why is it that a tower of identical disc magnets behaves differently (is stronger than?) a single magnet.

Known: NO NUMBERS

Each disk is identical in every shape and form

**2. Homework Equations**This is the equation I found:

**3. The Attempt at a Solution**I figured that as more and more discs are attached 'L' increases, as it gets longer, however this causes the Flux density at x (B

_{x}) to decrease. The only logical thing I got out of that is that the Residual flux density must increases as more are added. The only problem is, I don't know how much. As the magnets are identical, is the increase uniform (B_{r}with one magnet = x, with two magnets = 2x, etc)? Exponential? Is there no change or is it the wrong equation?Thank you for your help.

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