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  4. In the figure shown, the potential difference across the diodes D1, D2 and the resistor of resistance 0.4 Ω are P, Q and R volts, respectively. Find P+Q+R. (Assume all diodes are ideal)

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Q. In the figure shown, the potential difference across the diodes $D_{1}, D_{2}$ and the resistor of resistance $0.4\, \Omega$ are $P$, $Q$ and $R$ volts, respectively. Find $P+Q+R$. (Assume all diodes are ideal)Physics Question Image

Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

Electrical equivalent:
$D_{1}$ and $D_{4}$ are reverse biased and $D_{2}$ and $D_{3}$ are forward biased.
$i=\frac{1.5}{0.2+0.4}=2.5\, A$
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