Electronic Devices - Semiconductors - Discussion

Discussion Forum : Semiconductors - General Questions (Q.No. 1)
A silicon diode measures a low value of resistance with the meter leads in both positions. The trouble, if any, is
the diode is open.
the diode is shorted to ground.
the diode is internally shorted.
the diode is working correctly.
Answer: Option
No answer description is available. Let's discuss.
40 comments Page 1 of 4.

RISHI NIGAM said:   2 years ago
Yes, it should not be internally shorted because according to me, the resistance can come to zero.

Habib said:   2 years ago
Right, thanks @Palkaushil.

Sang said:   3 years ago

According to me,

1. When the diode is forward biased, it acts like a closed switch. So, only a few/less resistance required to conduct it.

2. When the diode is reverse biased, it acts like an open switch. So, a high resistance (infinity) is required to conduct it (pass current through it).

3. Some say, this is internally short. (in both forward and reversed bias).

In ideal cases, the internal resistance (when short) can be zero.

But, in practical cases, the internal resistance (when short) cannot be zero. It offers at least a few resistance.

But, this case is not good for a diode.

Am I right? Please tell me.

Ch Mydhili said:   4 years ago
It is observed to test the working condition of the diode.

Ch Mydhili said:   4 years ago
Good working Diode in Forward Bias acts as a closed switch therefore Forward Resistance is low.

In Reverse Bias, it acts as an open switch therefore Reverse Resistance is High.

If the diode has low resistance in both the cases then it is shorted internally and not good for use.

Suvarna said:   5 years ago
When the diode is forward bias it is short circuited.

Saranya said:   7 years ago
What is meant by diode? What is the main application of diode?

Punam m kapse said:   8 years ago
In forward bias a diode is short circuit and have zero resistance, so silicon diode measure a low value of resistance.

Sameer said:   8 years ago
The answer is option C because the output is not correct when in the circuitry some of the problems such as the connection are short.

Sulochana said:   9 years ago
Ideal means?

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