JEE Main Electrostatics Important Questions 2026:
Electrostatics is an important chapter in
JEE Main 2026 Syllabus
Physics in terms of weightage. The JEE or Joint Entrance Examination (Main) is conducted for admission to undergraduate engineering and architecture courses in various colleges in India. Electrostatics is a fundamental concept in Physics that is commonly covered in the IIT JEE. It is a vital chapter for understanding other related topics in Physics, such as capacitors and electric fields. Candidates preparing for
JEE Main 2026
can find a list of
JEE Main Electrostatics Important Questions
along with the solutions on this page, which will further help them practice and ace their exam preparation.
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Read this article to learn more about JEE Main Electrostatics Important Questions. We have listed down the major topics and chapter-wise weightage to help the students understand the difficulty level better. Alongside, JEE Main Previous Year’s Question Papers are also available here.
JEE Main 2026 Electrostatics – Important Topics
While practising the JEE Main Electrostatics questions, students must be aware of the important topics. These topics have been shared based on the previous year’s question paper analysis and trends. The important topics for JEE Main Electrostatics are also covered in the curriculum of Classes 11 & 12, so students are not completely new to the chapters. Check out the important topics to study for IIT JEE Electrostatics here –Coulomb's law
Conservation of Charge
Forces between multiple charges
Electric Field lines
Electric Field
Electric Dipole
Electric charges due to a dipole
Electric Flux
Torque
Gauss’s Law
Electrostatic field
Electrical Potential energy of the system
Conductors and insulators
Capacitors and a combination of capacitors
Dielectrics and electric polarisation
Capacitance
Energy
JEE Main 2026 Electrostatics – Year-wise Weightage, No. of Questions
In the last five years, questions have been consistently asked from IIT JEE Electrostatics topics, such as Coulomb’s Law, Electric Charge, Conductors and insulators, and so on. Keeping up with the trend, candidates can expect at least 2 questions from the list of JEE Main Electrostatics important topics this year. Since each question carries 4 marks as per the JEE Main marking scheme, candidates can score 4-8 marks easily in this section. Take a look at the year-wise weightage of questions and marks here –| Year | Average No. of Questions Asked | Marks Allotted to Each Question | Total Marks Allotted |
|---|---|---|---|
| 2023 | 2 | 4 | 8 |
| 2022 | 1 | 4 | 4 |
| 2021 | 1 | 4 | 4 |
| 2020 | 2 | 4 | 8 |
| 2019 | 1 | 4 | 4 |
JEE Main 2026 Electrostatics Important Questions
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Go through the JEE Main Electrostatics important questions and solutions here –
Q1: Three charges +Q, q, +Q are placed respectively, at distance 0, d/2 and d from the origin, on the x-axis. If the net force experienced by +Q placed at x = 0 is zero, then value of q is
(a) +Q/4
(b) –Q/2
(c) +Q/2
(d) –Q/4
Solution
QQ/d2 + Qq/(d/2)2 =0
Q + 4q = 0
or q = -Q/4
Answer: (d) –Q/4
Q2: An electric field of 1000 V/m is applied to an electric dipole at an angle of 45°. The value of the electric dipole moment is 10–29 Cm. What is the potential energy of the electric dipole?
(a) –10 × 10–29 J
(b) –7 × 10–27 J
(c) –20 × 10–18 J
(d) –9 × 10–20 J
Solution
E = 1000 V/m , p = 10-29 cm, θ = 450
Potential energy stored in the dipole,
U = -p.Ecos θ = – 10-29 x 1000 x cos450
�=−12×10−26
U = – 0.707 x 10-26 J= -7 x 10 -27 J
Answer: (b) –7 × 10–27 J
Also Read: JEE Main 2026: List of Chapters & Topics Covered Under Physics Section
Q3: A parallel plate capacitor having capacitance 12 pF is charged by a battery to a potential difference of 10 V between its plates. The charging battery is now disconnected and a porcelain slab of dielectric constant 6.5 is slipped between the plates. The work done by the capacitor on the slab is
(a) 508 pJ
(b) 692 pJ
(c) 560 pJ
(d) 600 pJ
Solution
Initial Energy of the capacitor, Ui = (1/2) CV2
= (1/2) x 12pF x 10 x 10
= 600 pJ
After the slab, the energy of the slab, Uf = (1/2) Q2/C’
Q = CV = (12 pF)(10 V) = 120 p C
C’ = kC = 6.5 x 120 x 10-12 F
Therefore, Uf = [(1/2) (120 x 10-12)2]/[6.5 x 120 x 10-12]
Uf = 92 pJ
W + Uf= Ui
⇒ W = Ui – Uf
= 600 pJ – 92 pJ
= 508 pJ
Answer: (a) 508 pJ
Q4: Voltage rating of a parallel plate capacitor is 500 V. Its dielectric can withstand a maximum electric field of 106 V m–1. The plate area is 10–4 m2. What is the dielectric constant if the capacitance is 15 pF? (given ε0 = 8.86 × 10–12 C2 N–1 m–2)
(a) 3.8
(b) 8.5
(c) 6.2
(d) 4.5
Solution
C = Kε0A/d and V = Ed
Or K = CV/ε0AEmax
K = (15 x 10-12 x 500)/(8.86 x 10-12 x 10-4 x 106) = 8.5
Answer: (b) 8.5
Q5: The bob of a simple pendulum has a mass of 2 g and a charge of 5.0 C. It is at rest in a uniform horizontal electric field of intensity 2000 V m–1. At equilibrium, the angle that the pendulum makes with the vertical is (take g = 10 m s–2)
(a) tan–1 (0.2)
(b) tan–1 (0.5)
(c) tan–1 (2.0)
(d) tan–1 (5.0)
Solution
The forces acting on the bob are its weight and the force due to field.
At equilibrium,
Tcosθ = mg ——-(1)
Tsinθ = qE ——–(2)
Dividing (2) by (1)
tanθ = qE/mg
θ = tan-1((5 x 10-6 x 2 x 103) / (2 x 10-3 x 10)) = tan-1(0.5)
Answer: (b) tan-1(0.5)
Also Read: List of Best Books & Online Study Materials for JEE Main 2026 Physics
Importance of Solving JEE Main Electrostatics Important Questions
Solving important questions for JEE Main Electrostatics can prove beneficial in more ways than one. Some of the major advantages of practising the previous year’s or JEE Main Sample Papers 2026 are listed below –Helps you gauge the topic-wise weightage, difficulty level and nature of the questions
Helps you identify your shortcomings and learn from your mistakes
Makes you familiar with the actual question pattern, so you know what to expect during the test
Helps you improve accuracy and speed as you learn the art of time management while practising the papers
Helps boost confidence
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FAQs
Candidates can check this page to review and download the important questions for JEE Main Electrostatics. They must treat these questions as sample papers and practice them regularly to improve their conceptual knowledge.
Going by the previous year’s trends, candidates can expect 1-2 questions worth 4-8 marks from the Electrostatics chapter in JEE Main Physics paper.
Electrostatics is a vital and one of the scoring chapters in JEE Main. Some of the important concepts to study from this section include electric field intensity, Gauss’s law, equipotential surfaces, electric potential energy, electric dipole, charge distribution etc.
Electrostatics in JEE Main involves questions based on integers and laws of Physics, which may be hard to memorize. We suggest you jot down the important laws, principles and formulas and revise them daily while solving JEE Main Electrostatics important questions to get a strong hold on the topics.
JEE Main Electrostatics is relatively easier to score but it requires a lot of practice and good command on the fundamental concepts. Students must inculcate the habit of practising JEE Main Electrostatics important questions regularly to do well in this section.
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