Three identical p-n junction diodes D₁, D₂, and D₃ are connected across a battery as shown in the figure. If the width of the depletion regions of D₁, D₂ and D₃ are W₁, W₂ and W₃, respectively, then the correct option is: (a) W₂ > W₁ = W₃ (b) W₁ > W₂ > W₃ (c) W₃ = W₁ > W₂ (d) W₃ > W₂ > W₁

Answer: (d). Battery positive terminal (long plate) is on the left node, negative on the right node. D₁ points from left to right: anode at higher potential, forward biased, so depletion width narrowest. D₃ points from right to left: reverse biased, so depletion width widest. D₂ branch is open (break in the wire), so D₂ is unbiased with its natural width. So W₃ > W₂ > W₁: the answer is (d).

Three identical p-n junction diodes D₁, D₂, and D₃ are connected… | NEET 2026 (Re-neet)

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P-N Junction Diode

Three identical p-n junction diodes $D_1, D_2$ , and $D_3$ are connected across a battery as shown in the figure. If the width of the depletion regions of $D_1, D_2$ and $D_3$ are $W_1, W_2$ and $W_3$ , respectively, then the correct option is:

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Answer: (d)

Battery positive terminal (long plate) is on the left node, negative on the right node.
$D_1$ points from left to right: anode at higher potential, forward biased, so depletion width narrowest.
$D_3$ points from right to left: reverse biased, so depletion width widest.
$D_2$ branch is open (break in the wire), so $D_2$ is unbiased with its natural width.
So $W_3 > W_2 > W_1$ : the answer is (d).

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