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Question

The figure shows two NAND gates followed by a NOR gate. The system is equivalent to the following logic gate



A
OR
loader
B
AND
loader
C
NAND
loader
D
None of these
loader

Solution

The correct option is B AND
X=¯¯¯¯¯¯¯¯¯¯¯A.B,Y=¯¯¯¯¯¯¯¯¯¯¯A.B,
Z=¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯X+Y=¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯A.B+¯¯¯¯¯¯¯¯¯¯¯A.B=¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯A.B=A.B
This Boolean expression behaves like AND Gate.

Physics

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