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12th Class Physics
Short Questions Preparation
Start Chapter 18 Preparation
12th Class Physics Chapter Wise Preparation
Online Short Questions For Chapter 7 "ICS Part 2 Physics Chapter 18 Short Questions Preparation "
Try The Short Questions For ICS Part 2 Physics Chapter 18 Short Questions Preparation
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Total Questions10
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Available Sets3
Physics - ICS Part 2 Physics Chapter 18 Short Questions Preparation
Question # 1
Why is the photodiode operated in reverse biased state?
- Ans 1: Photodiode is used for the detection of light.So it is used in reverse biased state.Reverse current increase with the intensity of incident light.When no light incidents,then reverse current will be negligible.
ICS Part 2 Physics Chapter 18 Short Questions Preparation - Set 1
Question # 1
Why is the photodiode operated in reverse biased state?
- Ans 1: Photodiode is used for the detection of light.So it is used in reverse biased state.Reverse current increase with the intensity of incident light.When no light incidents,then reverse current will be negligible.
ICS Part 2 Physics Chapter 18 Short Questions Preparation - Set 2
Question # 1
The anode of a diode is 0.2V positive with respect to the cathode,It it forward biased?
- Ans 1: Yes when anode is 0.2V positive with respect to cathode,it is forward biased.But the value of potential barrier for germanium is 0.3 V and for silicon is 0.7 V.Therefore there will be no conduction of current.
ICS Part 2 Physics Chapter 18 Short Questions Preparation - Set 3
Question # 1
Explain why an ordinary Silicon diode does not emit light.
- Ans 1: Ordinary silicon is opaque to light,So it does not emit visible light.It emits infrared light.To emit light ,gallium arsenide or gallium arsenide photodiode are used as semiconductor.
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