Digital Electronics - Logic Gates - Discussion

63. 

From the truth table for a three-input NOR gate, what is the only condition of inputs A, B, and C that will make the output X high?

[A]. A = 1, B = 1, C = 1
[B]. A = 1, B = 0, C = 0
[C]. A = 0, B = 0, C = 1
[D]. A = 0, B = 0, C = 0

Answer: Option D

Explanation:

No answer description available for this question.

G.V.Narayanan said: (Sep 23, 2011)  
Ya its right.

How its possible for this gate.

The (OR) gate of first two input is (0 0) its output for (0).

Otherwise the NAND gate of output is complement of OR gate.

Its reverse process.

Deepika said: (Jan 29, 2012)  
OR gate operation is reverse of NOR gate.

Aaftab said: (Feb 19, 2020)  
Option C is right or gate is inverse of nor gate.

Kishan said: (Feb 27, 2020)  
C output in or gate s = 1 bcom nor gate s = 0.
D output in or gate s = 0 bcom nor gate s = 1.
So answer s D.

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