Question

What does a high resistance reading in both forward and reverse bias directions indicate?
$\left( A \right){\text{ Diode is faulty}}$
$\left( B \right){\text{ Diode is good}}$
$\left( C \right){\text{ Open circuit}}$
$\left( D \right){\text{ None of the above}}$

Answer 1

For answering this question we have to know about the forward and reverse bias and in semiconductor diode forward bias will be offered low resistance and in reverse bias, the resistance will offer high resistance. So by using this statement we will be able to solve this question.

Complete step by step solution:
Greater the resistance means that there is no current flowing from one terminal to another in a diode in both the cases. So if there is no current rolling. Also, we can say that when the diode is in forwarding condition resistance will be very high and that will impact the current and in this case, no current will flow through it. And also the voltage across the diode will become very high and this will be achieved when the device will be open. So we can say that it is an open circuit.
Hence, the option $\left( C \right)$ is correct.

Note:
On the contrary, it can be false too as if we consider that the OHM meter is defective then in this case the meter will show wrong readings. Also, we should have to keep in mind that when the resistance is very high then only the diode circuit will be opened.