Which one of the following gates will have an output of 1? [AIPMT 1998] |
A) A
B) B
C) C
D) D
Correct Answer: C
Solution :
[a] Gate A is NAND gate, is output will be |
\[{{Y}_{A}}=\overline{1.1}=\bar{1}=0\] |
[b] Gate B is NOR gate, is output will be |
\[{{Y}_{B}}=\overline{1+1}=\bar{1}=0\] |
[c] Gate C is NAND gate, its output will be |
\[{{Y}_{C}}=\overline{0.1}=\overline{0}=1\] |
[d] Gate D is XOR gate, its output will be |
\[{{Y}_{D}}=0\oplus 0=0\cdot \overline{0}+\overline{0}\cdot 0=0\] |
Thus, gate [c] will give an output of 1. |
Note: Option [d] represents a logic symbol of exclusive OR gate or XOR gate. Its descriptive form showing is Boolean expression may be represented as: |
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