ocr: 109 Checking Semiconductors with an Ohmmeter P-N Diodes (including Zener, Photodiodes, or any simple P-N junction) Ohmeter + lead to Ohmeter -lead to Operational Results D Anode (forward bias) Cathode short or low resistance (10-1000 ohms depending on diode type) Cathode (reverse bias) Anode open or high resistance (Germanium: IM ohm typical. Silicon: 10M ohm or greater Tunnel Diodes Ohmeter +1 lead to Ohmeter -lead to Operational Results Anode (forward bias) Cathode short or low resistance Cathode (reverse bias) Anode same, slightly lower with Cathode on + Photoconductive Cells Ohmeter + lead ...