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Question

In a given circuit as shown the two input waveform A and B are applied simultaneously. The resultant waveform Y (in shape) is


A


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B


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C


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D


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Solution

The correct option is A



(1 = high, 0 = low)
Input to A is in the sequence, 1,0,1,0.
Input to B is in the sequence, 1, 0, 0, 1.
Sequence is inverted by NOT gate.
Thus inputs to OR gate becomes 0, 1, 0, 1 from A and 0,1,1,0 from B and output of OR gate becomes 0, 1, 1, 1
Since for OR gate 0 + 1 = 1.
Hence choice (a) is correct.


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