In a p+n junction diode under reverse bias, the magnitude of electric field is maximum at

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ESE Electrical 2014 Paper 2: Official Paper
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  1. The edge of the depletion region of the p – side

  2. The edge of the depletion region on the n – side 

  3. The p+n junction

  4. The centre of the depletion region on the n – side

Answer (Detailed Solution Below)

Option 3 :

The p+n junction

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Detailed Solution

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The depletion region width in a region is inversely proportional to the doping density of that region

Since doping in p side is higher, the depletion region width of p side will be less

The maximum/minimum value of the electric field always occurs at the junction interface.

The variation of electric field in depletion region is shown in the figure

So option (c) is correct.

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