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NEET 2016 (Phase 2) · P-N Junction Diode

P-N Junction Diode question from NEET 2016 (Phase 2)

Q96NEET 2016 · PHASE 2Medium

P-N Junction Diode

The given circuit has two ideal diodes connected as shown in the figure. The current flowing through the resistance R1 will be

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Answer: (a)

The top terminal of the $10$ V battery is positive, so current flows through $R_1$ to the top junction.
$D_1$ points up (reverse biased), so the $R_2$ branch is open; $D_2$ points down (forward biased), so the $R_3$ branch conducts.
Total resistance $= R_1 + R_3 = 2 + 2 = 4\ \Omega$
$I = \dfrac{10}{4} = 2.5$ A
So the answer is (a) $2.5$ A.

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