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Standard XII
Physics
Logic Gates
Question
If the output
Y
of the following circuit is
1
, the inputs
A
B
C
must be :
010
100
110
101
A
010
B
100
C
110
D
101
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Solution
Verified by Toppr
From left, the first gate is OR gate and the output of OR gate is
Y
1
=
A
+
B
and the second gate is AND gate.
The output of AND gate is
Y
=
Y
1
.
C
=
(
A
+
B
)
.
C
For
010
,
Y
=
(
0
+
1
)
.0
=
0
;
For
100
,
Y
=
(
1
+
0
)
.0
=
0
;
For
101
,
Y
=
(
1
+
0
)
.1
=
1
and
For
110
,
Y
=
(
1
+
1
)
.0
=
1.0
=
0
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