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When LED is forward biased, then...

When LED is forward biased, then

A

electrons from the n-type material cross the p-n junction and recombine with holes in the p-type material

B

electrons and holes neutralise each other

C

at junction electrons and holes remains at rest

D

None of the above

Text Solution

Verified by Experts

The correct Answer is:
A
When LED is forward biased, then electrons from the n-type material cross the p-n junction and recombine with holes in p-type material.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-SEMICONDUCTORS-Exercise 1 ( TOPICAL PROBLEMS )
  1. In a reverse biased p-n junction, when the applied bias voltages is eq...

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  2. In a p- n junction diode not connected to any circuit,

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  3. When LED is forward biased, then

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  4. A full wave rectifier uses two diodes with a load resistance of 100 Om...

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  5. In forward biasing of the p-n junction:

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  6. In a P-N junction diode :

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  7. In the middle of the depletion layer of a reverse - biased p - n junc...

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  8. In a semi conductor diode , the barrier potential offers opposition to...

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  9. For germenium crystal, the forbidden energy gap in joules is

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  10. A 220 V AC supply is connected between points A and B. What will...

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  11. If an alternating voltage is applied across a diode in series with a l...

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  12. In half - wave rectification, what is the output frequency, if the inp...

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  13. The p-n junction which generates an emf when solar radiation falls on ...

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  14. Avalanche breakdown in a PN junction diode is to

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  15. If in a p-n junction diode , a square input single of 10 V is applied...

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  16. Pure Si at 300 K has equal electron (n(e)) and hole (n(h)) concentrati...

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  17. In an unbiased p-n junction,

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  18. The difference in the variation of resistance with temperature in a me...

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  19. In semiconductor the concentrations of electron and holes are 8xx10^(1...

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  20. A light emitting diode (LED) has a voltage drop of 2V across it and pa...

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