🔍 Key Concepts

• Forward bias vs. reverse bias behavior of a semiconductor diode • How an ohmmeter reading relates to current flow through a diode • The difference between an open circuit and a short circuit in terms of resistance

💭 Think About

• In normal operation, would you expect a diode to conduct (show low resistance) in both directions, or mainly in one? • If a component always shows low resistance no matter which way you connect the meter leads, what does that say about its ability to block current? • Which fault condition corresponds to almost no opposition to current flow vs. no current flow at all?

✅ Before You Answer

• Recall that a healthy diode should have very different resistance readings in forward vs. reverse bias. • Match the symptom: low resistance in both directions to either "no conduction" or "excessive conduction" fault types. • Eliminate any answers that describe normal diode behavior or properties not typically checked with an ohmmeter (like capacitive quality).