Class 12 Exam > Class 12 Questions > A photodiode is used preferably ina)to increa...
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A photodiode is used preferably in
- a)to increase voltage
- b)in forward bias condition
- c)to convert electrical energy into light
- d)in reverse bias condition
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A photodiode is used preferably ina)to increase voltageb)in forward bi...
In a photo-diode when light is incident, the fractional increase in the majority carriers is much less than the fractional increase in the minority carriers. Consequently, the fractional change due to the photo-effects on the minority carrier dominated reverse bias current is more easily measurable than the fractional change due to the photo-effects on the majority carrier dominated forward bias current. Hence, photo-diodes are preferred to be used in the reverse bias condition to easily observe the variation of current with intensity.
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A photodiode is used preferably ina)to increase voltageb)in forward bi...
Photodiode in Reverse bias condition, LED in forward biased condition and solar cell in unbiased condition. remember it...
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A photodiode is used preferably ina)to increase voltageb)in forward bi...
Photo diode is used to detect light.
In a reverse biased condition, the width of the depletion region increases as the applied reverse bias voltage increases across the diode. So, by applying a larger voltage, more of the incident photons are converted to electric current thereby increasing the efficiency.
In forward biased conditions, the width of the depletion region decreases so only a small portion of the incident photons get converted to electric current and hence the efficiency is less.
Hence photo diode in reverse biased condition detects light.
In a reverse biased condition, the width of the depletion region increases as the applied reverse bias voltage increases across the diode. So, by applying a larger voltage, more of the incident photons are converted to electric current thereby increasing the efficiency.
In forward biased conditions, the width of the depletion region decreases so only a small portion of the incident photons get converted to electric current and hence the efficiency is less.
Hence photo diode in reverse biased condition detects light.
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A photodiode is used preferably ina)to increase voltageb)in forward bias conditionc)to convert electrical energy into lightd)in reverse bias conditionCorrect answer is option 'D'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about A photodiode is used preferably ina)to increase voltageb)in forward bias conditionc)to convert electrical energy into lightd)in reverse bias conditionCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A photodiode is used preferably ina)to increase voltageb)in forward bias conditionc)to convert electrical energy into lightd)in reverse bias conditionCorrect answer is option 'D'. Can you explain this answer?.
A photodiode is used preferably ina)to increase voltageb)in forward bias conditionc)to convert electrical energy into lightd)in reverse bias conditionCorrect answer is option 'D'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about A photodiode is used preferably ina)to increase voltageb)in forward bias conditionc)to convert electrical energy into lightd)in reverse bias conditionCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A photodiode is used preferably ina)to increase voltageb)in forward bias conditionc)to convert electrical energy into lightd)in reverse bias conditionCorrect answer is option 'D'. Can you explain this answer?.
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