GATE 2020 EE Q.30 answer: Laws & node/mesh (Network Theory)

GATE 2020 · EEQ.30 · 2 marks · MCQ

Consider the diode circuit shown below. The diode, D, obeys the current-voltage characteristic $I_{D} = I_{S} (exp (\frac{V _{D}}{n V _{T}}) - 1)$ , where $n > 1$ , $V_{T} > 0$ , $V_{D}$ is the voltage across the diode and $I_{D}$ is the current through it. The circuit is biased so that voltage, $V > 0$ and current, $I < 0$ . If you had to design this circuit to transfer maximum power from the current source ( $I_{1}$ ) to a resistive load (not shown) at the output, what values of $R_{1}$ and $R_{2}$ would you choose?

GATE 2020 EE question 30: Two horizontal rails, top and bottom. — Figure from the GATE 2020 EE paper. It is part of the question.

(A)
Large $R_{1}$ and large $R_{2}$ .
(B)
Small $R_{1}$ and small $R_{2}$ .
(C)
Large $R_{1}$ and small $R_{2}$ .
(D)
Small $R_{1}$ and large $R_{2}$ .

GATE 2020 EE Q.30: official answer

Official answer

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