Semiconducting Devices Question 81
Question: To get an output 1 from the circuit shown in the figure, the input must be
[UPSEAT 2002]
Options:
A) $ A=0,B=1,C=0 $
B) $ A=1,B=0,C=0 $
C) $ A=1,B=0,C=1 $
D) $ A=1,B=1,C=0 $
Show Answer
Answer:
Correct Answer: C
Solution:
The Boolean expression for the given combination is output $ Y=(A+B).C $ The truth table is
| A | B | C |
| 0 | 0 | 0 |
| 1 | 0 | 0 |
| 0 | 1 | 0 |
| 0 | 0 | 1 |
| 1 | 1 | 0 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 1 |
Hence $ A=1 $ , $ B=0 $ , $ C=1 $
