Physics Circle home Student Login

Home›Chapters›Semiconductor Electronics PYQs›Logic Gates›Question 123

JEE Main 2021 (31 Aug, Shift 1) · Logic Gates

Logic Gates question from JEE Main 2021 (31 Aug, Shift 1)

Q123JEE Main 2021 · 31 AUG · SHIFT 1Medium

Logic Gates

In the following logic circuit the sequence of the inputs A, B are (0, 0), (0, 1), (1, 0) and (1, 1). The output Y for this sequence will be:

Figure

Show answer and solution

Answer: (c)

  1. P=ABP = AB, Q=A+BQ = A + B, Y=PQ‾=AB(A+B)‾=AB‾Y = \overline{PQ} = \overline{AB(A + B)} = \overline{AB}.
  2. So Y is NAND of A and B: 00 only for (1,1)(1, 1).
  3. Sequence (0,0),(0,1),(1,0),(1,1)(0,0), (0,1), (1,0), (1,1) gives 1,1,1,01, 1, 1, 0.
  4. So the answer is (c).
Report a mistake

More questions on Logic Gates