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  4. In the following circuit of P N junction diodes D1, D2 and D3 are ideal, then i is

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Q. In the following circuit of $P N$ junction diodes $D_{1}, D_{2}$ and $D_{3}$ are ideal, then $i$ isPhysics Question Image

Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

Diodes $D_{1}$ and $D_{3}$ are forward biased and $D_{2}$ is reverse biased.
So the circuit can be redrawn as follows:
$\Rightarrow i=\frac{E}{R}$

Solution Image