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JEE Main202126 Aug 2021Evening ShiftPhysicsSemiconductorsActual

Four NOR gates are connected as shown in figure. The truth table for the given figure is :

Options

  1. AA B Y 0 0 1 0 1 0 1 0 1 1 1 0
  2. BA B Y 0 0 0 0 1 1 1 0 1 1 1 0
  3. CA B Y 0 0 1 0 1 0 1 0 0 1 1 1
  4. DA B Y 0 0 0 0 1 1 1 0 0 1 1 1

Correct answer

C. A B Y 0 0 1 0 1 0 1 0 0 1 1 1

Step-by-step solution

y = ( A + A + B ¯ ) ¯ + ( B + A + B ¯ ) ¯ ¯ y = ( A + A + B ¯ ) · ( B + A + B ¯ )   A     B     Y   0 0 1 1 1 1 0 1 0 1 0 0

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