Electromagnet Testing

[Makingnewnamesisdumb]

You could have measured more accurately by moving the scale each time. Particularly in the beginning, your measurements would have been better because you measured the ceramic magnets as though they had traveled parallel to the scale rather than at an angle intersecting the scale. I believe that the single ceramic magnet in the first tests did travel a little farther on average than the doubled up ceramic magnets. Also, you really should have used equipment that could actually measure the data.

[Truthbeeknown]

I did this more times than I show on the video. I stand by what is shown.

[Makingnewnamesisdumb]

I don't deny that the results are plausible, I'm just saying that there is a huge margin for error in your practices in the video.

[clanwar13]

nerd

[Truthbeeknown]

You say that like it's a bad thing. haha

[violamaestro]

About how many joules are you putting into that thing?

[Truthbeeknown]

use the formula 1/2C(V)^2

[durian789]

Nicely done. Very educational for those who intend to self build a charging system to self power a DC motor for electric cars. Expand your design, see Flint Parallel Magnetic Path. With just the battery alone can you not fire the magnets?

[Truthbeeknown]

Yes.. I'm getting there.. this is just a small demo of one way to go about it.. Yes read the Fling material. 1000 ways to skin a cat if you know what I mean...

I can, but this the the cap has a very specific joule rating, thus the purpose of using it.. see explanation on the top right by the subscribe button.

[RobotMachines]

I like your experiment. What gauge wire is on the spool? Thanks

[Truthbeeknown]

Thanks, 18 bifilar...

[sparc5]

What is the wire wrapped around and what are the ends composed of?

[Truthbeeknown]

The wire is wrapped around a plastic form. The coil is from a Ford(?) solenoid for a starter. I'm not sure what you mean about the ends...

[mrinalberry]

do you know the gauge of the wire? I've tried the same experiment but the magnet doesn't move the same distance as yours. maybe its dependent on more than the wire?... can you advise

[nali99]

Ok true... stacking 10 of them will give you a slightly stronger overall magnet (but only like 10% stronger) compare to a single one, but certainly not 10 times as strong.

[Truthbeeknown]

I said that two of them stacked together will give double the field strength. Maybe I should have said "holding power". ie will pick up double the amount of metal. Google a magnet supplier. Look at 1" round, 1/2 inch thick NIB's. Look at the holding force. Now look up the same specs for a 1" round by 1" thick. Notice that that holding force is double..

[nali99]

Hi there, In magnetic simulation software it is obvious. If you want to increase 'power' you need to increase the pole surface and not the magnet volume. So pole surface and type of magnet determents the strength. A test: take that neo magnet you have and try to pick up heavy steel with it. Now stack like 10 of these neo's on top of each other and see of you get 10 times the power.

[Truthbeeknown]

I can appreciate similation software, real life experiments are the ultimate test.. in the case of this video, notice that two magnets stacked goes the same distance as just a single one. So double the mass, moves the same distance, so the field strength must double as well... I never said anything about stacking ten of them, Yet stacking five ceramics does give a huge holding force over just one... try it!

[nali99]

Placing two magnets onto of each other does not double the field strength.

[Truthbeeknown]

Can you give me proof? A formula would be great.

Thanks in advance.