JEE Main 2025 Jan 29 Shift 2, Physics Q18: Logic Gates
JEE Main2025Jan 29, Shift 2Physics
Q.
The truth table for the circuit given below is :
- A
A B Y 0 0 0 0 1 1 1 0 1 1 1 0 - B
A B Y 0 0 0 1 0 0 1 1 0 0 1 1 - C
A B Y 0 0 0 1 0 1 0 1 0 1 1 0 - D
A B Y 0 0 0 1 1 1 1 0 1 0 1 1
Solution
Trace the logic. The upper AND gate receives and , giving . The lower AND gate receives and , giving . The OR gate combines them:
.
This is the standard expression for the Exclusive-OR (XOR) function.
XOR table: exactly when and differ.
| A | B | Y |
|---|---|---|
| 0 | 0 | 0 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
This matches option (1).
Concept behind this question
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