The Alternating Current in JEE Advanced Exam contributes approximately 3% weightage to the total Physics marks, with 2-3 questions usually asked from each topic.
Alternating current is a current which keeps changing in magnitude continuously. It also changes its direction periodically and is generally considered to be of moderate difficulty. Over the last 5 years, questions have been asked from topics such as types of current. Alternating current is a topic in the unit of Electricity & magnetism in class 12 Physics.
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- Download JEE Advanced Syllabus 2025
- Download JEE Advanced 2024 Paper With Detailed Solutions
- JEE Advanced Previous Year Question Paper PDF Download
Listed below is the list of Alternating current questions with detailed solutions asked in JEE Advanced exam 2025:
Question 1:
In the circuit shown, $
Question 2:
Question 3:
An AC voltage source of variable angular frequency to and fixed amplitude V is connected in series with a capacitance C and an electric bulb of resistance R (inductance zero). When to is increased :
- the bulb glows dimmer
- the bulb glows brighter
- total impedance of the circuit is unchanged
- total impedance of the circuit increases
Question 4:
A coil of inductance 8.4 mH and resistance 6Ω is connected to a 12 V battery. The current in the coil is 1A at approximately the time
- 500 s
- 20 s
- 35 ms
- 1 ms
Question 5:
JEE Advanced 2025 Exam Pattern
The JEE Advanced 2025 exam consists of two papers: Paper 1 and Paper 2. Both papers are compulsory and must be attempted by the candidates. The exam will be conducted online (computer-based).
Subject-wise Syllabus: JEE Advanced 2025
The JEE Advanced 2025 Subject-wise Syllabus covers crucial topics across Physics, Chemistry, and Mathematics, with each subject focusing on advanced concepts.
- Mathematics emphasizes Calculus and Algebra (accounting for up to 40% of the exam)
- Physics delves into Mechanics and Electrodynamics, while Chemistry includes topics like Physical Chemistry and Organic Chemistry.
- As observed from past data that Mathematics often carries the highest weightage, making it a critical area for focused preparation.
JEE Advanced Chapter-wise Weightage
The JEE Advanced chapter-wise weightage helps you understand which topics carry more importance in the exam. By focusing on high-weightage chapters, you can optimize your preparation. For example, in Mathematics, topics like Calculus and Algebra usually carry about 50-60% of the questions, while in Physics, Mechanics and Electromagnetism contribute significantly.
JEE Advanced Physics - Weightage and Important Topics
| Topic | Approximate Weightage | Important Topics |
|---|---|---|
| Mechanics | 20-25% | Kinematics, Laws of Motion, Work, Energy & Power, Rotational Motion |
| Thermodynamics | 8-12% | First and Second Laws of Thermodynamics, Entropy, Heat Transfer |
| Electrostatics and Magnetism | 15-18% | Coulomb’s Law, Electric Fields, Gauss’s Law, Ampere’s Law, Magnetic Field due to Currents |
| Modern Physics | 10-15% | Photoelectric Effect, Atomic Models, Nuclear Physics, Semiconductors |
| Optics | 8-10% | Reflection & Refraction, Wave Optics (Interference, Diffraction) |
| Properties of Matter | 5-8% | Elasticity, Surface Tension, Viscosity |
| Gravitation | 5-7% | Gravitational Force, Potential Energy, Kepler’s Laws |
- Mechanics (particularly Kinematics and Laws of Motion) have a higher weightage, often constituting a major chunk of the Physics paper.
- Modern Physics, with topics like the Photoelectric Effect and Nuclear Physics, remains significant with high-scoring potential.
- Physical Chemistry and Organic Chemistry both have a large weightage. Topics like Chemical Kinetics and Reaction Mechanisms in Organic Chemistry are crucial and frequently asked.
- Inorganic Chemistry remains a reliable scoring area with an emphasis on Periodic Table and Coordination Compounds.
JEE Advanced 2025: Subject-wise Weightage
| Subject | Weightage | Important Topics |
|---|---|---|
| Physics | 25-30% | Mechanics, Electrostatics, Magnetism, Modern Physics, Thermodynamics |
| Chemistry | 25-30% | Physical Chemistry, Organic Chemistry, Inorganic Chemistry |
| Mathematics | 35-40% | Algebra, Calculus, Coordinate Geometry, Trigonometry, Probability |
- Mathematics holds the highest weightage, so mastering Calculus and Algebra is critical.
- Physics and Chemistry both have significant portions dedicated to Mechanics and Physical Chemistry, respectively.
- Regular practice of important topics like Modern Physics, Organic Chemistry, and Coordinate Geometry can help candidates maximize their scores in JEE Advanced 2025.
To find the Minimum Marks Required to Qualify JEE Advanced 2025, it's also important to understand the category-wise cutoff criteria set by the exam authorities.
Previous Years’ Question Paper
JEE Advanced 2024 Question Paper PDF
| Paper | Question Paper PDF | Answer Key PDF |
|---|---|---|
| Question Paper 1 PDF | Download PDF | Download PDF |
| Question Paper 2 PDF | Download PDF | Download PDF |
JEE Advanced 2023 Question Paper PDF
| Paper | Question Paper PDF | Answer Key PDF |
|---|---|---|
| Question Paper 1 PDF | Download PDF | Download PDF |
| Question Paper 2 PDF | Download PDF | Download PDF |
JEE Advanced 2022 Question Paper PDF
| Paper | Question Paper PDF | Answer Key PDF |
|---|---|---|
| Question Paper 1 PDF | Download PDF | Download PDF |
| Question Paper 2 PDF | Download PDF | Download PDF |
JEE Advanced 2021 Question Paper PDF
| Question Paper | PDF Download | ||
|---|---|---|---|
| Question Paper 1 PDF | Physics | Chemistry | Maths |
| Question Paper 2 PDF | Physics | Chemistry | Maths |
JEE Advanced 2020 Question Paper
| Question Paper | Question Paper PDF | Answer Key PDF |
|---|---|---|
| Question Paper 1 PDF | Download PDF | Download PDF |
| Question Paper 2 PDF | Download PDF | Download PDF |
Frequently Asked Questions:
Is alternating current important for the NEET UG exam 2025?
Yes, Alternating current has an importance in the JEE Advanced exam with 3% in the Physics paper and 2-3 questions every year. It includes Mean Value of AC, Average value of AC, Inductive reactance, capacitive reactance, form factor and Resonance in an RLC circuit.
Is JEE Advanced 2025 Tough?
The JEE Advanced 2025 is expected to be one of the most challenging exams for aspirants. JEE Advanced is known for its high level of difficulty.
Syllabus Complexity:
The JEE Advanced 2025 syllabus covers a wide range of topics in Physics, Chemistry, and Mathematics. While some topics are foundational, others are highly difficult and require a deep understanding. The difficulty increases due to the complexity of questions and nature of the syllabus.
| Subject | Topics |
| Physics | Mechanics, Electricity and Magnetism, Optics, Modern Physics |
| Chemistry | Organic Chemistry, Inorganic Chemistry, Physical Chemistry |
| Mathematics | Algebra, Calculus, Trigonometry, Coordinate Geometry, Vectors |
Which is the hardest topic in the JEE Advanced exam ?
There are some JEE Advanced Physics topics that are considered tougher due to their lengthy problem-solving and conceptual toughness.
In Physics, students should focus on the following topics - Work, Power, Energy, Current Electricity, Laws of Thermodynamics, Electromagnetic Induction, Alternating Current, Magnetic Effects of Current, and Electrostatics.
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