NEETPhysicsSemiconductors
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): A logic circuit consisting of two NOT gates whose outputs are connected to the inputs of a NAND gate behaves as an OR gate. Reason (R): A NAND gate is a universal logic gate and can be used to construct any basic logic gate. In the light of the above statements, choose the most appropriate answer f
Options
- ABoth Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
- BBoth Assertion and Reason are correct and Reason is the correct explanation for Assertion.
- CAssertion is correct but Reason is incorrect.
- DAssertion is incorrect but Reason is correct.
Correct answer
A. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
Step-by-step solution
Assertion (A) is correct: The inputs to the NAND gate are A and B . The output of the NAND gate is Y = A B . According to De Morgan's theorem, this simplifies to Y = A + B , which is the boolean expression for an OR gate. Reason (R) is correct: A NAND gate is indeed a universal gate, meaning it can be used to realize any basic logic gate (AND, OR, NOT). However, Reason (R) is a general factual statement and does not provide the mathematical explanation (De Morgan's theorem) for why this specific configuration resul