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Semiconductor Electronics

JEE Main 2026 (Online) 4th April Evening ShiftMCQMedium📈 Topic in 18% papers+4−1
Ques. 1JEE Main 2026, 4 April (Evening Shift)

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Choose the correct answer from the options given below :

  1. Both (A) and (R) are true and (R) is the correct explanation of (A)
  2. Both (A) and (R) are true but (R) is NOT the correct explanation of (A)
  3. (A) is true but (R) is false
  4. (A) is false but (R) is true

Answer

(3) (A) is true but (R) is false

Solution

In reverse bias a very small current (of the order of μA) flows, almost independent of the applied voltage; at the critical (breakdown) voltage it increases suddenly. (A) is true.

Below the breakdown voltage the reverse current is due to the drift of minority carriers across the junction; majority carriers are stopped by the barrier. (R), which says majority carriers, is false.

Answer: (3)

Keep practising — Semiconductor Electronics

Ques. 2JEE Main 2026, 4 April (Evening Shift)

A diode has Zener voltage of 10 V and maximum power dissipation of 0.5 W, then the minimum resistance to be used in series with this diode for safety when it is connected to a 25 V power supply is Ω.

Ques. 3JEE Main 2026, 2 April (Morning Shift)

For the given circuit (shown in part (A)) the time dependent input voltage vin(t) and corresponding output vo(t) are shown in part (B) and part (C), respectively. Identify the components that are used in the circuit between points X and Y. [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 4JEE Main 2026, 2 April (Evening Shift)

If X and Y are the inputs, the given circuit works as . [figure]

  1. OR gate
  2. AND gate
  3. NAND gate
  4. NOR gate
Ques. 5JEE Main 2026, 28 January (Morning Shift)

Assuming in forward bias condition there is a voltage drop of 0.7 V across a silicon diode, the current through diode D1 in the circuit is mA. (Assume all diodes in the given circuit are identical) [figure]

  1. 17.6
  2. 18.8
  3. 20.15
  4. 11.7
Ques. 6JEE Main 2026, 28 January (Evening Shift)

Two p-n junction diodes D1 and D2 are connected as shown in figure. A and B are input signals and C is the output. The given circuit will function as a . [figure]

  1. AND Gate
  2. OR Gate
  3. NOR Gate
  4. NAND Gate
Ques. 7JEE Main 2026, 24 January (Morning Shift)

A voltage regulating circuit consisting of Zener diode, having breakdown voltage of 10 V and maximum power dissipation of 0.4 W, is operated at 15 V. The approximate value of protective resistance in this circuit is .

Ques. 8JEE Main 2026, 24 January (Evening Shift)

Identify the correct truth table of the given logic circuit. [figure]

  1. arrayccc A & B & Y \ 0 & 0 & 0 \ 0 & 1 & 0 \ 1 & 0 & 1 \ 1 & 1 & 0 array
  2. arrayccc A & B & Y \ 0 & 0 & 0 \ 0 & 1 & 1 \ 1 & 0 & 1 \ 1 & 1 & 0 array
  3. arrayccc A & B & Y \ 0 & 0 & 1 \ 0 & 1 & 1 \ 1 & 0 & 1 \ 1 & 1 & 0 array
  4. arrayccc A & B & Y \ 0 & 0 & 1 \ 0 & 1 & 0 \ 1 & 0 & 1 \ 1 & 1 & 0 array
Ques. 9JEE Main 2026, 23 January (Morning Shift)

The following diagram shows a Zener diode as a voltage regulator. The Zener diode is rated at Vz = 5 V and the desired current in load is 5 mA. The unregulated voltage source can supply up to 25 V. Considering the Zener diode can withstand four times the load current, the value of resistor Rs (shown in circuit) should be . [figure]

  1. 100
  2. 10
  3. 1000
  4. 4000
Ques. 10JEE Main 2026, 23 January (Evening Shift)

For the given logic gate circuit, which of the following is the correct truth table? [figure]

  1. arrayccc n & m & z \ 0 & 0 & 1 \ 0 & 1 & 1 \ 1 & 1 & 0 \ 1 & 0 & 0 array
  2. arrayccc n & m & z \ 0 & 0 & 1 \ 0 & 1 & 0 \ 1 & 1 & 1 \ 1 & 0 & 0 array
  3. arrayccc n & m & z \ 0 & 0 & 0 \ 0 & 1 & 1 \ 1 & 1 & 0 \ 1 & 0 & 1 array
  4. arrayccc n & m & z \ 0 & 0 & 1 \ 0 & 1 & 0 \ 1 & 1 & 0 \ 1 & 0 & 0 array
Ques. 11JEE Main 2026, 22 January (Morning Shift)

Find the correct combination of A, B, C and D inputs which can cause the LED to glow. [figure]

  1. 1000
  2. 0011
  3. 0100
  4. 1101

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