By reverse biasing the PN junction diode, the width of depletion layer .
-
A.
is independent of bias
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B.
remains same as that of in forward bias PN junction
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C.
increases
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D.
decreases
Correct Answer:
C. increases
Explanation:
When a PN junction diode is reverse biased, the positive terminal of the battery is connected to the n-type material and the negative terminal to the p-type material. This setup pulls the majority carriers—electrons in the n-section and holes in the p-section—away from the junction. As these mobile carriers move toward the terminals, they leave behind more immobile ionized donor and acceptor atoms near the interface. Consequently, the region devoid of free charge carriers, known as the depletion layer, expands in width. This increased thickness creates a higher potential barrier, which effectively prevents the flow of majority carriers and results in a very high resistance across the junction.
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