Question
Physics Question on Logic gates
Identify the logic gate given in the circuit :
A
NAND - gate
B
OR - gate
C
AND gate
D
NOR gate
Answer
OR - gate
Explanation
Solution
The given circuit has two inputs, A and B, each passing through a NOT gate, making the inputs Ā and B̄. These modified inputs are then fed into a NAND gate, which gives the output Y as follows:
1. Output of NAND Gate:
Y = (Ā ⋅ B̄).
2. Apply De Morgan’s Law:
Using De Morgan’s law:
Y = (Ā ⋅ B̄) = A + B.
Thus, the output Y behaves as an OR gate.
Answer: OR gate