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In a p-n junction,

1. The potential of the p and n-sides becomes higher alternately
2. The p-side is at higher electrical potential than the n side
3. The n-side is at higher electrical potential than the p-side
4. Both the p and n-sides are at the same potential

Correct answer: The p-side is at higher electrical potential than the n side

Solution

In a p-n junction, the p-side is at a higher electrical potential than the n-side due to the built-in potential difference created by the diffusion of charge carriers across the junction.

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