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Ohm's Law in Scalar Form

In the follow...

Question

In the following circuit of PN junction diodes $D_{1}, D_{2} a n d D_{3}$ are ideal then i is

A

\frac{E}{R}

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B

\frac{E}{2 R}

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C

\frac{2 E}{3 R}

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D

Z e r o

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Solution

The correct option is A $\frac{E}{R}$
Diodes $D_{1} a n d D_{3}$ are forward biased and $D_{2}$ is reverse biased so the circuit can be redrawn as follows.
$\Rightarrow i = \frac{E}{R}$

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