When the positive lead of an ohmmeter is connected to the cathode of a diode and the negative lead is connected to the anode, the meter reads_________
A) an infinitely high resistance
B) a very low resistance
C) a high resistance initially, decreasing to about 100$\Omega$
D) a gradually increasing resistance

Question

When the positive lead of an ohmmeter is connected to the cathode of a diode and the negative lead is connected to the anode, the meter reads_________
A) an infinitely high resistance
B) a very low resistance
C) a high resistance initially, decreasing to about  100$\Omega$
D) a gradually increasing resistance

Quizplus · Accepted Answer

A diode is a semiconductor device that allows current flow only in one direction. When an ohmmeter is connected to a diode in the reversed biased direction (positive lead to the cathode and negative lead to the anode), there should be no current flow, and the diode should act like an open circuit. This should result in an infinite resistance reading on the ohmmeter.

When the Positive Lead of an Ohmmeter Is Connected to the Cathode