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A two-way switch has three terminals a, b and c. In ON position (logic value 1), a is connected to b, and in OFF position, a is connected to c. Two of these two-way switches S1 and S2 are connected to a bulb as shown below.
Which of the following expressions, if true, will always result in the lighting of the bulb ?
  • a)
  • b)
  • c)
  • d)
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
A two-way switch has three terminals a, b and c. In ON position (logic...
If it's looked carefully, bulb will be on when both switch s1 and s2 are in same state, either off or on. that is exnor operation
S1 S2  Bulb
0   0    On
0   1    Off
1   0    Off
1   1   On
it's Ex-NOR operation hence (C) is the correct option.
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A two-way switch has three terminals a, b and c. In ON position (logic value 1), a is connected to b, and in OFF position, a is connected to c. Two of these two-way switches S1 and S2 are connected to a bulb as shown below.Which of the following expressions, if true, will always result in the lighting of the bulb ?a)b)c)d)Correct answer is option 'C'. Can you explain this answer?
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