KCET · Physics · Semiconductors
Identify the incorrect statement.
- A When a \(p\)-n junction diode is forward biased, then the width of the depletion region decreases.
- B When a \(p\) - \(n\) junction diode is reverse biased, the barrier potential increases.
- C A photodiode is operated in the reverse bias.
- D An LED is a lightly doped \(p\) - \(n\) junction diode which emits spontaneous radiation of forward biasing.
Answer & Solution
Correct Answer
(D) An LED is a lightly doped \(p\) - \(n\) junction diode which emits spontaneous radiation of forward biasing.
Step-by-step Solution
Detailed explanation
The LED is a heavily doped \(p\) - \(n\) junction with forward biasing. It is a specially designed forward biased \(p\) - \(n\) junction diode that emits light spontaneously when energised.
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