First slide

P-N junction diode

Question

Two sides of a semiconductor Germanium crystal A and B are doped with Arsenic and Indium, respectively. They are connected to a battery as shown in figure.
The correct graph between current and voltage for the arrangement is :

Moderate

A
B
C
D

Solution

When As (V group) is added to Ge (IV group) it becomes n-type.
$In$ (III group) is added to Ge (IV) it becomes p-type.
Therefore, the given diode is in Reverse Bias.

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