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Electronics - Diodes and Applications - Discussion

Discussion Forum : Diodes and Applications - General Questions (Q.No. 19)
Diodes and Applications
19.
A pn junction allows current flow when
the p-type material is more positive than the n-type material
the n-type material is more positive than the p-type material
both the n-type and p-type materials have the same potential
there is no potential on the n-type or p-type materials
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
6 comments Page 1 of 1.
Banti kumar said:   5 years ago
Option A is the answer.
Roshan Siwakoti said:   5 years ago
In p tpye no of Holes are majority whereas in n type no of electron are in majority. So the flow of current is due to holes.
Shadan said:   8 years ago
Because diode is made of P and N both type of material. You know.

But a current flow when one his concentration is high aor other low so P is high and n of concentration is low so current flow from p to n.

Not n to p.
Vishnu said:   8 years ago
Can anyone explain me clearly?
Bhavya said:   1 decade ago
I didn't understand it. Can anyone explain it more clearly?
Mukesh mishra said:   1 decade ago
There are more holes near the depletion boundary than deeper into the n-region. Therefore they undergo a thermal diffusion, resulting in a net flux of holes (red) away from the depletion boundary.
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