The premalloy rod is about two and a half feet long and a third of an inch thick.

Permalloy Bar

Item 303
In service Good - Normal Wear

About

9BB100 - Passive Magnetic Components
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1

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Used in demonstrations

Four-panel sequence: top left shows the permalloy bar label, top right shows wire pieces hanging from the bar tip, bottom left shows pieces clinging to the bar held at an angle, bottom right shows pieces falling as the bar is rotated perpendicular to the field

Permalloy Bar

Students see that a high-permeability material (permalloy) becomes magnetized by Earth's field alone when aligned with it, and loses its magnetization when rotated perpendicular. This demonstrates that magnetization depends on …