When testing a diode in reverse bias with an ohmmeter, what reading can be expected?

When testing a diode in reverse bias with an ohmmeter, the expected reading is typically OL (Open Loop). This indicates that there is virtually no current flowing through the diode in that direction, which is the expected behavior of a diode when it is reverse-biased. A diode is designed to allow current to flow in one direction (forward bias) and block it in the other (reverse bias).

In reverse bias, the diode presents an extremely high resistance, effectively acting as an open circuit. An open loop reading confirms that the diode is functioning correctly in reverse bias, as it allows minimal to no current to pass through.

For the other readings: 0Ω would suggest a short circuit, which would indicate a failure; 100Ω suggests some current is flowing against the design of the diode; and infinity may also imply a lack of conduction but does not reflect the operational characteristics analyzed with an ohmmeter in this context. Thus, the OL reading is the most appropriate representation of a diode under reverse-biased conditions.