The current through the ammeter (neglecting internal resistance) in the following circuit is

  • A
    $2$ $A$
  • B
    $1$ $A$
  • C
    $0.5$ $A$
  • D
    $0$

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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 widths 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:

In forward biasing of the $p-n$ junction:

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