The output of an OR gate is connected to both the inputs of a NAND gate. The combination will serve asa)AND gateb)NOT gatec)NAND gated)NOR gateCorrect answer is option 'D'. Can you explain this answer?

Question

Answer

CONCEPT:

AND Gate: The Logic AND Gate is a digital logic circuit whose output is 1 (HIGH) only when all the inputs are 1 (HIGH)

OR Gate: The Logic OR Gate is a digital logic circuit whose output goes HIGH to a logic level 1 only when one or more of its inputs are HIGH

NOT Gate: The Logic NOT Gate is the most basic of all the logic gates and is often referred to as an Inverting Buffer or simply an Inverter.

NAND Gate: The logic Gate is obtained after adding NOT Gate after AND Gate.

NOR Gate: The logic Gate is obtained after adding NOT Gate after OR Gate.

Since the output of OR Gate is input for both the inputs of NAND Gates, Both the inputs will be the same.
When a NAND gate is connected to the same input it acts as a NOT Gate.
The output of NAND Gate will be (same input)

If NOT Gate is added after OR Gate, It will act as NOR Gate.
So, The output of an OR gate is connected to both the inputs of a NAND gate. The combination will serve as NOR Gate. Hence the correct answer is option 4.

Answer

CONCEPT:

AND Gate: The Logic AND Gate is a digital logic circuit whose output is 1 (HIGH) only when all the inputs are 1 (HIGH)

OR Gate: The Logic OR Gate is a digital logic circuit whose output goes HIGH to a logic level 1 only when one or more of its inputs are HIGH

NOT Gate: The Logic NOT Gate is the most basic of all the logic gates and is often referred to as an Inverting Buffer or simply an Inverter.

NAND Gate: The logic Gate is obtained after adding NOT Gate after AND Gate.

NOR Gate: The logic Gate is obtained after adding NOT Gate after OR Gate.

Since the output of OR Gate is input for both the inputs of NAND Gates, Both the inputs will be the same.
When a NAND gate is connected to the same input it acts as a NOT Gate.
The output of NAND Gate will be (same input)

If NOT Gate is added after OR Gate, It will act as NOR Gate.
So, The output of an OR gate is connected to both the inputs of a NAND gate. The combination will serve as NOR Gate. Hence the correct answer is option 4.

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