Semiconductors & Electronic Devices JEE Main PYQs PDF, 2020–2026

Semiconductors & Electronic Devices questions per year

in the free PDF asked, not in the PDFThe PDF only has questions we can print in full with a checked answer, so it holds 158 of the 167 asked.

Topic-wise weightage by year

How many Semiconductors & Electronic Devices questions each topic had in every JEE Main year (all shifts), counting every question asked, including ones not in the PDF. Darker cells mean more questions.

Swipe the table sideways for older years.

Newest questions (2026)

The 12 newest of the 20 JEE Main 2026 Semiconductors & Electronic Devices questions in the free PDF, latest shift first. The 2026 papers asked 21 in all.

1. JEE Main 2026 · 8 Apr · Shift 2 · Logic Gates

   $\text{ The output}Y\text{ for the given inputs}A\text{ and}B\text{ to the circuit is:}$

   
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2. JEE Main 2026 · 6 Apr · Shift 1 · p-n Junction Diode

   The maximum rated power of the LED is 2 mW and it is used in the circuit with input voltage of 5 V as shown in the figure below. The current through resistance $R_{S}$ is 0.5 mA .

   The minimum value of the resistance of $R_{S}$, to ensure that the LED is not damaged is $\_\_\_\_$ ${\mathrm{k}}\Omega$.

   
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3. JEE Main 2026 · 6 Apr · Shift 2 · Logic Gates

   Refer to the logic circuit given below. For two inputs ( $A=1,B=1$ ) and ( $A=0,B=1$ ), output ( Y ) will be $\_\_\_\_$ .

   
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4. JEE Main 2026 · 5 Apr · Shift 1 · Logic Gates

   For the given logic circuit, which of the following inputs combination will make both LED-1 and LED-2 to glow?

   
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5. JEE Main 2026 · 5 Apr · Shift 2 · p-n Junction Diode

   In a semiconductor $p$-n diode, the doping concentrations on $p$-side and $n$-side are ${10}^{{15}}$ atoms $/{\mathrm{cm}}^{3}$ and ${10}^{{18}}$ atoms $/{\mathrm{cm}}^{3}$, respectively. Which one of the following statements is true?

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6. JEE Main 2026 · 4 Apr · Shift 2 · p-n Junction Diode

   Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason ${\mathbf{R}}$

   Assertion A : A diode under reverse-biased condition provides very small current which is nearly independent of voltage until a critical limit at which the current increases drastically.

   Reason R : Below the critical voltage limit, only majority charge carriers flow which increases drastically above critical voltage.

   choose the correct answer from the options given below

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7. JEE Main 2026 · 4 Apr · Shift 1 · Logic Gates

   Two 4 bits binary numbers, $A=1101$ and $B=1010$ are given in the inputs of a logic circuit shown in figure below. The output $(Y)$ will be :

   
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8. JEE Main 2026 · 4 Apr · Shift 2 · p-n Junction Diode

   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 $\_\_\_\_$ $\Omega$.

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9. JEE Main 2026 · 4 Apr · Shift 1 · p-n Junction Diode

   Consider a circuit consisting of a capacitor $(20\mu{\ \mathrm{F}})$, resistor $(100\Omega)$ and two identical diodes as shown in figure. The resistance of diode under forward biasing condition is $10\Omega$. The time constant of the circuit is $\alpha\times {10}^{{-3}}{\ \mathrm{s}}$. The value of $\alpha$ is $\_\_\_\_$

   
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10. JEE Main 2026 · 2 Apr · Shift 2 · Logic Gates

    If X and Y are the inputs, the given circuit works as _________.

    
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11. JEE Main 2026 · 2 Apr · Shift 1 · p-n Junction Diode

    For the given circuit (shown in part (A)) the time dependent input voltage $v_{{in}}(t)$ and corresponding output $v_{{o}}(t)$ are shown in part (B) and part (C), respectively. Identify the components that are used in the circuit between points X and Y.

    
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12. JEE Main 2026 · 28 Jan · Shift 1 · p-n Junction Diode

    Assuming in forward bias condition there is a voltage drop of 0.7 V across a silicon diode, the current through diode $D_{1}$ in the circuit is $\_\_\_\_$ mA .

    (Assume all diodes in the given circuit are identical)

    
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Practise the 2026 Semiconductors & Electronic Devices questions online

Sample questions from recent papers

JEE Main 2025 · 7 Apr · Shift 1 · Zener Diode

In the following circuit, the reading of the ammeter will be

$($ Take Zener breakdown voltage $=4 \mathrm{~V})$

1. (A)60 mA
2. (B)80 mA
3. (C)10 mA
4. (D)24 mA

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Answer: (C)

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JEE Main 2025 · 4 Apr · Shift 2 · Intrinsic and Extrinsic Semiconductors

Consider a n-type semiconductor in which $\mathrm{n}_{\mathrm{e}}$ and $\mathrm{n}_{\mathrm{h}}$ are number of electrons and holes, respectively.

(A) Holes are minority carriers

(B) The dopant is a pentavalent atom

(C) $\mathrm{n}_{\mathrm{e}} \mathrm{n}_{\mathrm{h}} \neq \mathrm{n}_i^2$

(where $\mathrm{n}_i$ is number of electrons or holes in semiconductor when it is intrinsic form)

(D) $\mathrm{n}_{\mathrm{e}} \mathrm{n}_{\mathrm{h}} \geqslant \mathrm{n}_i^2$

(E) The holes are not generated due to the donors

Choose the correct answer from the options given below :

1. (A) (A), (B), (E) only
2. (B) (A), (C), (E) only
3. (C) (A), (B), (C) only
4. (D) (A), (C), (D) only

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Answer: (A)

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JEE Main 2023 · 13 Apr · Shift 1 · Transistors

From the given transfer characteristic of a transistor in $\mathrm{CE}$ configuration, the value of power gain of this configuration is $10^{x}$, for $\mathrm{R}_{\mathrm{B}}=10 ~\mathrm{k} \Omega$, and $\mathrm{R}_{\mathrm{C}}=1 ~\mathrm{k} \Omega$. The value of $x$ is __________.

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Answer: 3

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JEE Main 2023 · 1 Feb · Shift 1 · Energy Bands

Match List I with List II:

	List I		List II
A.	Intrinsic semiconductor	I.	Fermi-level near the valence bond
B.	n-type semiconductor	II.	Fermi-level in the middle of valence and conduction band.
C.	p-type semiconductor	III.	Fermi-level near the conduction band
D.	Metals	IV.	Fermi-level inside the conduction band

Choose the correct answer from the options given below :

1. (A)A-III, B-I, C-II, D-IV
2. (B)A-II, B-I, C-III, D-IV
3. (C)A-I, B-II, C-III, D-IV
4. (D)A-II, B-III, C-I, D-IV

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Answer: (D)

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JEE Main 2021 · 31 Aug · Shift 2 · Rectifiers

Statement - I :

To get a steady dc output from the pulsating voltage received from a full wave rectifier we can connect a capacitor across the output parallel to the load R_L.

Statement - II :

To get a steady dc output from the pulsating voltage received from a full wave rectifier we can connect an inductor in series with R_L.

In the light of the above statements, choose the most appropriate answer from the options given below :

1. (A)Statement I is true but Statement II is false
2. (B)Statement I is false but Statement II is true
3. (C)Both Statement I and Statement II are false
4. (D)Both Statement I and Statement II are true

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Answer: (D)

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The free PDF above has all 158 questions grouped by topic, with an answer key.

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