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JEE Main · 2025 · 08 Apr 2025 · Shift 2 · Semiconductors

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The output voltage in the following circuit is (Consider ideal diode case)
  1. (A)10 V
  2. (B)0 V✓ Correct
  3. (C)+5 V
  4. (D)-5 V

Answer: (B)

Solution

Both diodes point towards the supply terminals, so each conducts only when the output node rises above the terminal on its far side. The resistor tied to the rail tends to pull the node positive, which forward-biases the diode joined to earth and lets it hold the node at earth potential, with no drop across an ideal diode. The diode in the branch then has its cathode at and anode at the node, so it stays reverse-biased and carries nothing, while the resistor current flows on to earth through the conducting diode. The output voltage is .

JEE Main · 2025 · 08 Apr 2025 · Shift 2 · Single correct option

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