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JEE Main 2008 (AIEEE) · Logic Gates

Logic Gates question from JEE Main 2008 (AIEEE)

Q176JEE Main 2008 · AIEEEMedium

Logic Gates

In the circuit below, $A$ and $B$ represent two inputs and $C$ represents the output.

The circuit represents

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Answer: (d)

Both diodes point toward the output; the resistor goes to ground.
If A or B is high, its diode conducts and C becomes high.
C is low only when both A and B are low: $C = A + B$ .
So the answer is (d) OR gate.

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