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JEE Main & Advanced Physics Semiconducting Devices Question Bank Digital Electronics

  • question_answer
    To get an output 1 from the circuit shown in the figure, the input must be                                            [UPSEAT 2002]

    A)            \[A=0,\,\,B=1,\,\,C=0\]

    B)            \[A=1,\,\,B=0,\,\,C=0\]

    C)            \[A=1,\,\,B=0,\,\,C=1\]

    D)            \[A=1,\,\,B=1,\,\,C=0\]

    Correct Answer: C

    Solution :

                       The Boolean expression for the given combination is   output \[Y=(A+B).C\] The truth table is
    A B C Y =(A+B).C
    0 0 0 0
    1 0 0 0
    0 1 0 0
    0 0 1 0
    1 1 0 0
    0 1 1 1
    1 0 1 1
    1 1 1 1
    Hence \[A=1\], \[B=0\], \[C=1\]


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