ICS Part 2 Physics Chapter 18 Short Questions Preparation


12th Class Physics
Short Questions Preparation

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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

Why charge carriers are not present in the depletion region?

  • Ans 1: This is due to the fact when an electron from an n region diffuses into the p-region,it leaves behind a positive ion.When this electron recombines with the hole in the p-region,a negative ion is formed,So no charge carrier are available in this region,though it contains immobile positive and negative ions.
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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

Why charge carriers are not present in the depletion region?

  • Ans 1: This is due to the fact when an electron from an n region diffuses into the p-region,it leaves behind a positive ion.When this electron recombines with the hole in the p-region,a negative ion is formed,So no charge carrier are available in this region,though it contains immobile positive and negative ions.
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ICS Part 2 Physics Chapter 18 Short Questions Preparation - Set 2

Question # 1

Why the biasing requirement of the junction of a transistor for its normal operation?

  • Ans 1: For the normal operation the base emitter junction of transistor is forward biased and collector base junction is reverse biased.
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ICS Part 2 Physics Chapter 18 Short Questions Preparation - Set 3

Question # 1

How the current flows in forward and reverse biased diode?

  • Ans 1: In forward biasing,the external potential difference supplies energy to free electrons in n-region and holes in p-region to overcome the potential barrier,a current of the orderof a few milli-amperes begins to flow across the pn junction.
    In reverse biasing ,no current flow due to the majority charge carrier,However a very small current of the order of of few micro amperes flow across the junction due to minority charge carriers.It is also known as reverse current or leakage current.
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ICS Part 2 Physics Chapter 18 Short Questions Preparation

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