Resistance Substitution Box Biology_Health & Genetics 2A rheostat with oxidized constantan

2A rheostat with oxidized constantan winding on a 300x44mm vitreous-enameled tube

Sixty-five-piece molecular model set with 32 atoms and 33 bonds for demonstrating bonding angles

restoring UV-C output in the compatible goggle sanitizer cabinet once the original lamp reaches end of service life

supplying the standard mid-range value used in the bulk of introductory Ohm's-law and voltage-divider investigations

Cork-lined four-prong jaws grip glassware up to 4

Resistance Substitution Box Biology_Health & Genetics 2A rheostat with oxidized constantanTwelve position substitution box rotating through 100 ohms to 470k ohms at 1W and plus or minus 1%, dropping a known resistance into a circuit without rewiring during Ohm's law work.