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JEE Main - Electronic Devices Important Questions (Free PDF Download)

Last updated date: 23rd May 2024
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Achieve Success in JEE Main 2024: Electronic Devices Important Questions With Solutions PDF

Vedantu provides a valuable resource for JEE Main 2024 in the form of strategically selected JEE Main Electronic Devices Important Questions, assembled with care by Vedantu's Master Teachers. They keep themselves informed about the latest trends to ensure the questions align perfectly with the JEE Main exam syllabus. These Electronic Devices important questions for JEE Main encompass multiple-choice questions (MCQs) and Integer Questions, allowing students to assess their skills at different levels. Supported by comprehensive solutions and explanations, the JEE Main Electronic Devices Important Questions PDF aids students in understanding the right strategies and methods. The PDF contains Previous Year Questions of Electronic Devices from JEE Main Exams, providing students with enough problem-solving skills for the upcoming exam. All these resources are free and can be easily accessed in PDF format for direct download from our website.


JEE Main Important Questions


Text, Images, Videos and PDF


JEE Main

Chapter Name:

Electronic Devices

Academic Session:



English Medium



Available Material:

Chapter-wise Important Questions with PDF

Electronic Devices Important Questions PDF for JEE Main should be an essential material for students since this chapter illuminates the intricate workings of semiconductors, transistors, and circuits, unveiling the foundation of modern electronics. You will get an idea of the importance of Electronic Devices in JEE Main by looking at the table below.

Year Wise Weightage of Questions: JEE Main Electronic Devices 

Sl. No.


Average No. of Questions Asked

Marks per Question

Total Marks





















To achieve your goals, prepare for your JEE Main exam 2024 with Vedantu’s Electronic Devices Important Questions PDF and JEE Main Physics Syllabus 2024.

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Electronic Devices JEE Main 2024: Important Topics

Here are a few Important topics students should consider when learning the Electronic Devices chapter. These subjects are selected from previous years' JEE Main exams. Therefore, before you get the Electronic Devices important questions for JEE Main, you can review this list of significant topics from Electronic Devices.

  • Semiconductor Physic

  • Diodes

  • Transistors

  • Transistor as an Amplifier

  • Transistor as a Switch

  • Logic Gates

  • Operational Amplifiers (Op-Amps)

  • Digital Electronics

  • Power Amplifiers

  • Feedback Amplifiers

  • Oscillators

  • Electronic Devices and Circuits in Daily Life

JEE 2024 Physics Important Questions: Get Chapter-wise Links Here

Access organized JEE 2024 Physics Important Questions with convenient chapter-wise links. Dive into essential topics, grasp key concepts, and prepare effectively for your exams. Get the edge you need these focused JEE Main Important Questions.

Why are Important Questions of Electronic Devices Essential for JEE Main 2024?

Students study Electronic Devices to excel in JEE Main due to its significant weightage in the JEE Main Important Questions from Previous Year JEE Main Exams. This chapter delves into the fundamentals of electronic components like diodes, transistors, and operational amplifiers, preparing students to tackle complex problems and secure a competitive edge in the examination.

Electronic devices play a crucial role in the JEE Main Exam, and understanding their key concepts and principles is essential for success. Here we aim to provide in-depth knowledge and valuable insights to help young students master electronic devices for the JEE Main exam.

The major features of the chapter that give you good score in the JEE Main examination:

Section 1: Understanding Transistors

What are Transistors?

Transistors are fundamental components of electronic devices that control the flow of electric current. They have a significant impact on the performance of electronic devices, making them a crucial topic for JEE Main preparation. This section will introduce the basic functionality of transistors and explain their importance in electronic devices.

Lightly Doped Region of a Transistor

Transistors consists of three regions: the emitter, base, and collector. Among these regions, the lightly doped region plays a vital role. This section will highlight the importance of the lightly doped region and explain how doping affects the conductivity and performance of a transistor.

Differences Between Emitter and Collector Regions

Understanding the differences in doping levels between the emitter and collector regions is crucial for mastering electronic devices. This section will elaborate on these differences and explain the roles of the emitter and collector regions in emitting and collecting majority charge carriers.

Section 2: Biasing of Transistor Diodes

Biasing Basics

Proper biasing is essential for the optimal performance of transistors. This section will introduce the concept of biasing, its importance in transistor operation, and its impact on the diodes of a transistor. Maintaining proper biasing is crucial for JEE Main preparation.

Normal Biasing of Transistor Diodes

Normal biasing is a technique used to maintain the desired voltage levels across a transistor's base-emitter and base-collector junctions. This section will provide a detailed description of normal biasing and explain its impact on the depletion regions of the transistor.

Section 3: Depletion Regions in Transistors

Understanding Depletion Regions

Depletion regions play a crucial role in controlling the flow of charge carriers in transistors. This section will explain the formation and characteristics of depletion regions and their significance in transistor functioning.

Number of Depletion Regions in a Transistor

Transistors have two depletion regions: the base-collector and base-emitter regions. Understanding the importance of these depletion regions is essential for mastering electronic devices. This section will emphasize their significance and discuss the possible effects of improper depletion region formation.

JEE Main 2024 Electronic Devices: Important Questions vs. Formulas

JEE Main formulas are like the building blocks of success in the exam, and when combined with well-structured Electronic Devices Important Questions for JEE Main, they become an indispensable tool for comprehensive understanding.

As you solve your JEE Main Important Questions, incorporate the associated formulas from the Electronic Devices chapter. Understand how the formula can be used while solving the Important Questions in Electronic Devices for JEE Main.

Important Formulas of Electronic Devices

1. Semiconductor Physics:

\[I_d = \mu_n C_{ox} \frac{W}{L} (V_{gs} - V_{th})^2\] (MOSFET Saturation current equation)

\[I_d = \mu_n C_{ox} \frac{W}{2L} (V_{gs} - V_{th})^2\] 

(For enhancement-type MOSFETs)

\[I_d = \mu_p C_{ox} \frac{W}{L} (V_{sg} - V_{th})^2\] (For p-channel MOSFETs)

2. Diodes:

\[I = I_s \left( e^{\frac{V}{nV_t}} - 1 \right)\] (Diode current-voltage relationship)

\[I_s = I_0 e^{-\frac{qV}{n k T}}\] (Reverse saturation current equation)

3. BJT (Bipolar Junction Transistor):

\[I_c = \beta \cdot I_b\] (Collector current in terms of base current)

\[I_c = \alpha \cdot I_e\] (Collector current in terms of emitter current)

\[I_e = I_c + I_b\] (Emitter current equation)

4. MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor):

\[I_d = \frac{\mu C_{ox} W}{2L} (V_{gs} - V_{th})^2\] (MOSFET saturation current equation)

\[I_d = \frac{1}{2} \mu C_{ox} \frac{W}{L} (V_{gs} - V_{th})^2\] (For long-channel MOSFETs)

5. Operational Amplifiers (Op-Amps):

\[V_{out} = A(v^+ - v^-)\] (Ideal op-amp voltage gain equation)

\[I_{in} = 0\] (Virtual short circuit concept)

6. Power in AC Circuits:

\[P = VI \cos \phi\] (Power in AC circuits)

7. Resonance:

\[f_0 = \frac{1}{2\pi\sqrt{LC}}\] (Resonant frequency in an LC circuit)

8. Frequency Response:

\[A_v = \frac{A_0}{\sqrt{1 + \left(\frac{f}{f_c}\right)^2}}\] (Frequency response of an amplifier)

9. Filters:

\[f_c = \frac{1}{2\pi RC}\] (Cut-off frequency for a first-order low-pass filter)

This integration sharpens your understanding, reinforces memory, and develops problem-solving skills—critical aspects of excelling in JEE Main 2024. Download the Important JEE Main Physics Formula PDF, including the Electronic Devices chapter, for free from Vedantu’s website and score more in your JEE Main 2024 Examinations.

Check Other Important Links for JEE Main 2024 Electronic Devices 

Explore additional resources beyond JEE Main 2024 Electronic Devices Important Questions. Check out these other useful links that provide access to learning materials, practice papers, mock tests, and valuable insights. Enhance your preparation, overcome difficulties, and welcome achievement with these resources designed specifically for JEE Main 2024.

Excel in Your Exams with Vedantu’s JEE Main Electronic Devices Important Questions

Electronic devices have revolutionized our lives in countless ways. From our smartphones that keep us connected to the world, to our laptops that help us work and learn, these devices have become an integral part of our daily existence. They offer convenience, efficiency, and endless possibilities. One noteworthy resource in this realm is the Electronic Devices Important Questions for JEE Main PDF by Vedantu. This valuable tool simplifies complex concepts, making learning more accessible and enjoyable. With features like concise summaries and solving the important questions, it empowers learners to excel in their studies. As we move forward in this digital age, electronic devices and resources like Vedantu's PDFs will continue to shape the way we learn and interact with the world.

JEE Mains PYQ Chapterwise: Mastering Electronic Devices with Past Papers

Conquering JEE Mains requires unwavering dedication and strategic preparation. One invaluable tool in your arsenal is the treasure trove of previous year question papers (PYQs). But navigating those years of questions can be overwhelming, especially for a crucial chapter like Electronic Devices. Enter JEE Mains PYQ Chapterwise: your key to targeted practice and exam mastery in this foundational subject.

By delving into JEE Main Chapter-wise PYQs for Electronic Devices, you gain laser-sharp focus on specific topics within this crucial domain. Imagine tackling your weakest areas, with a targeted set of past questions, building confidence and competence one problem at a time.

Whether you prefer the convenience of a JEE Mains Previous Year Questions Chapter Wise for Electronic Devices with PDF download or prefer working directly from online resources, the benefits are undeniable. You'll hone your problem-solving skills, learn to apply theoretical knowledge to real-world scenarios involving Electronic Devices, and develop the exam temperament needed to excel under pressure, especially when faced with Electronic Devices questions. Remember, these questions are like blueprints for future JEE Mains papers – studying them is like peeking into the exam itself!

So, unleash the power of JEE Main PYQ Chapterwise for Electronic Devices. Download your chosen resources, pick your weakest topic within this chapter, and start practicing. Each solved question is a step closer to your JEE Mains dream. Remember, consistency is key! Make chapterwise PYQs for Electronic Devices a daily ritual, and watch your confidence and competence soar as you approach the exam with a laser-sharp focus and a wealth of knowledge at your fingertips, ready to conquer even the most challenging topics in Electronic Devices.

FAQs on JEE Main - Electronic Devices Important Questions (Free PDF Download)

1. What are some important questions related to Electronic Devices for JEE Main 2024?

JEE Main 2024 Important Questions on Electronic Devices primarily cover topics like diodes, transistors, operational amplifiers, and semiconductor physics. These questions are crucial for your JEE Main preparation.

2. What topics are covered under semiconductor physics in the JEE Main 2024 Important Questions for Electronic Devices?

Topics covered under semiconductor physics include intrinsic and extrinsic semiconductors, carrier concentration, electron and hole mobility, and the Hall effect.

3. What should I know about diodes when studying JEE Main 2024 Important Questions on Electronic Devices?

Diodes are crucial semiconductor devices. Study their types (PN junction diodes, Zener diodes), working principles, V-I characteristics, and applications. Solve problems related to diode circuits.

4. What is the role of logic gates in JEE Main 2024 Electronic Devices Important Questions?

Logic gates are building blocks of digital electronics. Study their types (AND, OR, NOT, NAND, NOR, XOR, XNOR), truth tables, Boolean algebra, and their application in designing digital circuits.

5. How should I approach solving numerical problems in Electronic Devices Important Questions for JEE Main?

Solving more important questions for JEE Main is key. Work on a variety of numerical problems related to semiconductor devices, diode circuits, transistor amplifiers, and operational amplifiers to build problem-solving skills.

6. Are there any specific tips for acing JEE Main 2024 Electronic Devices Important Questions?

Focus on conceptual clarity, regular solving of JEE Main Important questions, and time management. Create a study schedule and revise regularly. Solve previous years' question papers to familiarize yourself with the exam pattern.

7. What is the significance of transistors in Electronic Devices JEE Main Important Questions?

Transistors are fundamental components. Learn about bipolar junction transistors (BJT) and field-effect transistors (FET). Understand their amplification properties, biasing, and transistor configurations.

8. Can you explain the importance of digital electronics in Important Questions for Electronic Devices in JEE Main 2024?

Digital electronics covers topics like flip-flops, counters, registers, and sequential logic circuits. Understanding these is essential for solving complex digital electronic circuits in the exam.