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Semiconductor Electronics

JEE Main 2025 (Online) 2nd April Evening ShiftMCQMedium📈 Topic in 55% papers+4−1
Ques. 1JEE Main 2025, 2 April (Evening Shift)

In the digital circuit shown in the figure, for the given inputs the P and Q values are : [figure]

  1. P = 0, Q = 1
  2. P = 1, Q = 0
  3. P = 0, Q = 0
  4. P = 1, Q = 1

Answer

(3) P = 0, Q = 0

Solution

Both inputs are 1.

NAND gate: 1 1 = 0

The two NOT gates (each fed with 1) give 0 and 0

OR gate: 0 + 0 = 0

AND gate (inputs: NAND output 0 and OR output 0): P = 0 0 = 0

NOT gate after NAND: 0 = 1

NOR gate (inputs 1 and OR output 0): Q = 1 + 0 = 0

P = 0, Q = 0

Answer: (3)

Keep practising — Semiconductor Electronics

Ques. 2JEE Main 2025, 29 January (Morning Shift)

[figure] For the circuit shown above, equivalent GATE is :

  1. NOT gate
  2. NAND gate
  3. AND gate
  4. OR gate
Ques. 3JEE Main 2025, 29 January (Evening Shift)

The truth table for the circuit given below is : [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 4JEE Main 2025, 28 January (Morning Shift)

Which of the following circuits has the same output as that of the given circuit? [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 5JEE Main 2025, 28 January (Evening Shift)

[figure] In the circuit shown here, assuming threshold voltage of diode is negligibly small, then voltage VAB is correctly represented by:

  1. [figure]
  2. [figure]
  3. VAB would be zero at all times.
  4. [figure]
Ques. 6JEE Main 2025, 24 January (Morning Shift)

Consider the following statements : Choose the correct answer from the options given below :

  1. A, C, E Only
  2. B, E Only
  3. A, C Only
  4. B, D, E Only
Ques. 7JEE Main 2025, 24 January (Evening Shift)

The output of the circuit is low (zero) for : [figure] Choose the correct answer from the options given below :

  1. (A), (B) and (C) only
  2. (A), (C) and (D) only
  3. (B), (C) and (D) only
  4. (A), (B) and (D) only
Ques. 8JEE Main 2025, 23 January (Evening Shift)

What is the current through the battery in the circuit shown below? [figure]

  1. 1.5 A
  2. 0.25 A
  3. 1.0 A
  4. 0.5 A
Ques. 9JEE Main 2025, 22 January (Morning Shift)

Which of the following circuits represents a forward biased diode? [figure] Choose the correct answer from the options given below:

  1. (C) and (E) only
  2. (A) and (D) only
  3. (B), (D) and (E) only
  4. (B), (C) and (E) only
Ques. 10JEE Main 2025, 22 January (Evening Shift)

[figure] To obtain the given truth table, following logic gate should be placed at G :

  1. NOR Gate
  2. OR Gate
  3. AND Gate
  4. NAND Gate

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