Economy Differential Pulley Capacity_500mL providing the high-resistance leg of

providing the high-resistance leg of a voltage divider where current draw needs to stay in the microampere range

5A bobbin coil for the demountable transformer

Hundred-milliamp tabletop analog DC ammeter at 2mA resolution

offering a 250g capacity at 5mg sensitivity for Archimedes-principle work

Hundred-milliamp DC scale on a 315x115mm laminated panel with sealed shunt

Economy Differential Pulley Capacity_500mL providing the high-resistance leg ofEconomy three step plastic differential pulley with 20, 40, and 60mm sheaves on a single rod mounted piece, a low cost option for introductory mechanical advantage demonstrations.