PNP Transistor Unit Physics_Light & Optics direct-reading current in the most-used

direct-reading current in the most-used range for student bench circuits

and d2sp3 atoms for hybridization-and-geometry visualization

5-inch height for free-spinning compass and magnetometer demonstrations

supplying the standard short-reach patch wire for student-built 4mm-socket circuits at the bench

Autoclavable polypropylene test tube stand holding six 25-mm tubes with six drying pins on the back

PNP Transistor Unit Physics_Light & Optics direct-reading current in the most-usedPNP transistor on a transparent base with 4mm color coded sockets and a printed circuit diagram, the complementary polarity counterpart to NPN for push pull and bias network demonstrations.