This 75mm blue & red painted bar magnet is ideal for doing magnetic repulsion & attraction experiments; only $0.50 (buy 2 for a repulsion/attraction pair).
See our blog on Magnet Experiments for Kids for more information and ideas.
Two 75x18x6.5mm bar magnets were placed in contact with opposing poles (N:N). They were released & the distance caused by the repulsive force was measured.
|Trial 1||Trial 2||Trial 3||Trial 4||Trial 5||Average|
Forty paper clips were placed in a 500ml beaker. A single 75x18x6.5mm ferrite bar magnet was dipped into the beaker to pick up as many paper clips as possible.
|Type||Trial 1||Trial 2||Trial 3||Trial 4||Trial 5||Average|
|Plastic Coated Steel||13||11||13||9||9||11|
|33545-SP1||Bar Magnets, Filings, Petri Dishes||20|
|43800||Electric Circuits & Bar Magnets Demo Kit||2|
Good strong magnet, not recommended for kids as they break easily when dropped.
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Yes, brittleness is their main drawback. But, dirt cheap compared to AlNiCo.