Air-Cooled Rheostat, 36Ω, 300 x 44mm Category_Science Kits Focuses sunlight through a 30cm

Focuses sunlight through a 30cm parabolic reflector onto a black copper target cup

Designed to grip a wide variety of optical components on standard bench rails

this compact insulated wire keeps color-coded wiring intact when student work shifts to small-scale breadboarded circuits

supplying two voltmeter scales on one accessory so students switch between low and mid-cell voltages without rewiring

Air-Cooled Rheostat, 36Ω, 300 x 44mm Category_Science Kits Focuses sunlight through a 30cmAir cooled rheostat at 36 ohms and 3A with constantan winding on a 300x44mm vitreous enameled tube, with a slide bar carriage and three binding posts at the winding ends and slide bar.