Question:medium
Identify the INCORRECT statement
Identify the INCORRECT statement
Show Hint
Dark current flows even without light and is caused by thermally generated minority carriers.
Updated On: Nov 12, 2026
- Dark current in photo diode flows only when the photodiode is reverse biased.
- Dark current in photo diode is caused by minority carriers flowing across the junction.
- Dark current in a photo diode is a small current, typically in the range of picoampere or nanoampere.
- Dark current in photo diode is only caused by external background radiation.
Show Solution
The Correct Option is D
Solution and Explanation
Step 1: Definition
Dark current is the current without any illumination.
Step 2: Origin
It comes from thermally generated electron-hole pairs, so it cannot depend only on external radiation.
Step 3: Conclusion
Statements A, B and C describe this correctly. Statement D contradicts the definition and is incorrect.
Final Answer:
Option D is the incorrect statement. \[ \boxed{\text{(D) }\text{Dark current in photo diode is only caused by external background radiation.}} \]
Dark current is the current without any illumination.
Step 2: Origin
It comes from thermally generated electron-hole pairs, so it cannot depend only on external radiation.
Step 3: Conclusion
Statements A, B and C describe this correctly. Statement D contradicts the definition and is incorrect.
Final Answer:
Option D is the incorrect statement. \[ \boxed{\text{(D) }\text{Dark current in photo diode is only caused by external background radiation.}} \]
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