Practice portal › Semiconductor Electronics › Digital Electronics and Logic Gates

Consider the following logic circuit. The output is Y=0 when [Figure: A and B feed an AND gate. B and A (from A through a NOT gate) feed an OR gate. The AND and OR outputs feed a NAND gate whose output is Y.]

Asked in JEE Main 7th April 2nd Shift 2025 · Gate combinations and truth tables

• (1) A=0 and B=1
• (2) A=1 and B=1
• (3) A=0 and B=0
• (4) A=1 and B=0

Step-by-step solution

Why the other options are wrong

• (1) The AND output is 0, so the NAND gives 1.
• (3) The AND output is 0, so the NAND gives 1.
• (4) The AND output is 0, so the NAND gives 1.

Reading this solution needs no sign-in. You only sign in to practise against the clock and keep your progress.