ICS Part 2 Physics Chapter 18 Short Questions Preparation


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 "

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Physics - ICS Part 2 Physics Chapter 18 Short Questions Preparation

Question # 1

Write a note on LED.

  • Ans 1: Light emitting diode are made from the special semiconductor such as gallium arsenide and gallium arsenide phosphide in which the potential barrier between p and n side is such that when electrons combines with a hole during forward biased conduction,a photon of visible light is emitted.
    LED are used in 7-segment display,small light sources etc.
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Prepare Complete Set Wise Questions For Chapter 7 "ICS Part 2 Physics Chapter 18 Short Questions Preparation "

ICS Part 2 Physics Chapter 18 Short Questions Preparation - Set 1

Question # 1

Write a note on LED.

  • Ans 1: Light emitting diode are made from the special semiconductor such as gallium arsenide and gallium arsenide phosphide in which the potential barrier between p and n side is such that when electrons combines with a hole during forward biased conduction,a photon of visible light is emitted.
    LED are used in 7-segment display,small light sources etc.
Submit

ICS Part 2 Physics Chapter 18 Short Questions Preparation - Set 2

Question # 1

Give four application or uses of photodiode?

  • Ans 1: It is used as
    1. Detection of both visible and invisible radiations.
    2. Logic circuits
    3. Automatic switching
    4. Optical communication equipment
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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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Physics
18th Chapter

ICS Part 2 Physics Chapter 18 Short Questions Preparation

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