Q131 / 180 · NEET 2017 · Physics

The given electrical network is equivalent to
Figure

  • A
    AND gate
  • B
    OR gate
  • Correct answer
    C
    NOR gate
  • D
    NOT gate

Solution

Figure

Output at NOR gate  Y 1 = A+B ¯

The output of first NOR gate is input to the second NOR gate, so the output of second NOR gate is  Y 2 = Y 1 + Y 1 ¯ = Y 1 ¯ = A+B ¯ ¯ =A+B

The output of NOT gate is  Y= Y 2 ¯ = A+B ¯

The given electrical network becomes equivalent to the NOR gate.

Hence, the correct answer is option: 'C'.

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