Which scenario indicates a shorted diode during testing?

A scenario that indicates a shorted diode during testing is when both sides read 0.0001 ohms. In this situation, the very low resistance value suggests that the diode is not functioning as intended, allowing current to flow through it in both directions, which characterizes a short circuit. A standard diode should only conduct in one direction, and any significant resistance or an open circuit reading should be observed when measuring across it.

When both leads of a diode read an almost equal and very low value, this typically signifies that the diode has lost its rectifying property and behaves more like a short circuit rather than a semiconductor device. Typically, in a properly functioning diode, one side would show a low resistance when forward-biased, and a higher resistance or an open line when reverse-biased.

In contrast, the other scenarios wouldn't indicate a shorted diode. If one side reads an open line (infinite resistance), it suggests a potentially open diode, not a short. If both sides read open line, it confirms that the diode is either damaged or not conducting. Lastly, if one side reads a value of 0.0001, it could imply that while one direction might be shorted, it does not confirm that both sides are exhibiting