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NEET 2012 (AIPMT, Prelims) · P-N Junction Diode

P-N Junction Diode question from NEET 2012 (AIPMT, Prelims)

Q106NEET 2012 · AIPMT · PRELIMSMedium

P-N Junction Diode

Two ideal diodes are connected to a battery as shown in the circuit. The current supplied by the battery is

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Answer: (d)

The left terminal of the battery is positive, so current flows left to right through the branches.
$D_1$ points right (forward), so the $10\ \Omega$ branch conducts; $D_2$ points left (reverse), so the $20\ \Omega$ branch is open.
$I = \dfrac{5}{10} = 0.5$ A
So the answer is (d) $0.5$ A.

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