When a $P-N$ junction is forward biased,which of the following is true?
- AThe positive terminal of the battery is connected to the $P$-region of the $P-N$ junction,and the depletion region is wide.
- BThe positive terminal of the battery is connected to the $N$-region of the $P-N$ junction,and the depletion layer is wide.
- CThe positive terminal of the battery is connected to the $N$-region of the junction,and the depletion region is thin.
- DThe positive terminal of the battery is connected to the $P$-region of the junction,and the depletion region is thin.
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