Extended-Range Rheostat, 200 x 44mm, Model B Biology_Health & Genetics this wooden simple-machine model lets

this wooden simple-machine model lets students measure input effort against output splitting force at different wedge angles

the optical-grade body delivering cleaner refraction angles than acrylic peers for precision Snell's law work

lets students compare how line density per unit length controls the spacing of the resulting interference pattern

and magnetic-property variations

Extended-Range Rheostat, 200 x 44mm, Model B Biology_Health & Genetics this wooden simple-machine model letsCompact 200x44mm extended range rheostat at 50 ohms and 2A, the smaller tube counterpart to the 300x44mm standard rheostats with the same constantan winding construction.