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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:
Detailed Solution
Diode $D_1$ is forward biased, $D_2$ is unbiased and $D_3$ is reverse biased. The depletion width decreases in forward bias and increases in reverse bias, so $W_3>W_2>W_1$.