In the circuit, the logical value of \(\mathrm{A}=1\) or \(\mathrm{B}=1\) when potential at A or B is 5 V and the logical value of \(\mathrm{A}=0\) or \(\mathrm{B}=0\) when potential at A or B is 0 V. The truth table of the given circuit will be :

(A) A B Y 0 0 0 1 0 0 0 1 0 1 1 1

(B) A B Y 0 0 0 1 0 1 0 1 1 1 1 1

(C) A B Y 0 0 0 1 0 0 0 1 0 1 1 0

(D) A B Y 0 0 1 1 0 1 0 1 1 1 1 0

JEE Main · 2022 · 25 Jul 2022 · Shift 1 · Semiconductors

In the circuit, the logical value of

A = 1

B = 1

when potential at A or B is 5 V and the logical value of

A = 0

B = 0

when potential at A or B is 0 V.

The truth table of the given circuit will be :

(A)A B Y
0 0 0
1 0 0
0 1 0
1 1 1✓ Correct
(B)A B Y
0 0 0
1 0 1
0 1 1
1 1 1
(C)A B Y
0 0 0
1 0 0
0 1 0
1 1 0
(D)A B Y
0 0 1
1 0 1
0 1 1
1 1 0

Answer: (A)

Solution

Output is high (1) only when both A and B are 1, when both diodes are reverse-biased and the output sits at 5 V; in every other case a diode conducts and the output falls to 0 V. This is the AND-gate truth table, option A.

JEE Main · 2022 · 25 Jul 2022 · Shift 1 · Single correct option

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JEE Main · 2022 · 25 Jul 2022 · Shift 1 · Semiconductors

Solution

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