Many important questions are formed in competitive exams like CUET, JEE, NEET, and boards from Class 12 Physics Chapter 1. Electrostatics is the branch of physics that deals with the properties of charges at rest and slow-moving electric charges. Below, we have provided Important Questions from Class 12 Physics Chapter 1 Electrostatics for your JEE Mains 2023 preparation. You can check it here for revision purposes.
Latest: Electrostatics Class 12 CUET Questions and Answers
Electrostatics Class 12 JEE Mains Questions and Answers
We’ve compiled a list of important questions about the Electrostatics physics class 12 chapter 1 that you should not miss while studying for your JEE Main Exams.
Electrostatics MCQ for JEE Mains
Q.1. A charged ball B hangs from a silk thread S, which makes an angle θ with a large charged conducting sheet P as shown in the figure. The surface charge density of the sheet is proportional to
(a) cos θ (b) cot θ (c) sin θ (d) tan θ
A.1. (d)
Explanation:
Q.2. Two charges, each equal to q, are kept at x = –a and x = a on the x-axis. A particle of mass m and charge q/2 is placed at the origin. If charge q/2 is given a small displacement h (h << a) along the y-axis, the net force acting on the particle is proportional to
(a) h (b) –h (c) 1/h (d) − 1 /h
A.2. (a)
Explanation:
Q.3. A and B are two identical spherical charged bodies which repel each other with force F, kept at a finite distance. A third uncharged sphere C of the same size is brought in contact with sphere B and removed. It is then kept at midpoint of A and B. Find the magnitude of force on C.
(a) F/2 (b) F/8 (c) F (d) zero
A.3. (c)
Explanation:
CUET Subjectwise Questions
Trending: How to Prepare for JEE from Class 11th
Q.4. Three point charges +q, –2q and +q are placed at points (x = 0, y = a, z = 0), (x = 0, y = 0, z = 0) and (x = a, y = 0, z = 0) respectively. The magnitude and direction of the electric dipole moment vector of this charge assembly are
(a) √2 qa along the line joining the points (x = 0, y = 0, z = 0) and (x = a, y = a, z = 0).
(b) √2 qa along the line joining the points (x = 0, y = 0, z = 0) and (x = a, y = a, z = a).
(c) √2 qa along + x direction.
(d) √2 qa along + y direction.
A.4. (a)
Explanation:
Q.5. Two charges q1 and q2 of 0.1 pC and –0.1 pC respectively are 10 Å apart. What is the electric field at a point on the line joining them at a distance of 10 cm from their mid-point?
(a) 18 × 10–10 N C–1 (b) 10 × 10–10 N C–1
(c) 8 × 10–10 N C–1 (d) 39 × 10–10 N C–1
A.5. (a)
Explanation:
Q.6. In Millikan’s oil drop experiment, an oil drop carrying a charge Q is held stationary by a potential difference of 2400 V between the plates. To keep a drop of half the radius stationary, the potential difference had to be made 600 V. What is charge on the second drop?
(a) Q/4 (b) Q/2 (c) Q (d) 3Q/2
A.6. (b)
Explanation:
Q.7. The potential difference applied to an X-ray tube is 5 kV and current through it is 3.2 mA. Then the number of electrons striking the target per second is
(a) 1 × 1017 (b) 2 × 1016
(c) 4 × 1015 (d) 5 × 106
A.7. (b)
Explanation:
Q.8. The plates of a parallel plate capacitor with air as medium are separated by a distance of 8 mm. A medium of dielectric constant 2 and thickness 4 mm having the same area is introduced between the plates. For the capacitance to remain the same, the distance between the plates is
(a) 8 mm (b) 5 mm (c) 12 mm (d) 10 mm
A.8. (d)
Explanation:
Q.9. If capacitance of three identical capacitors in series is 1 μF and later they are connected in parallel. Find the ratio of energy stored in the two configurations, if they are both connected to the same source.
(a) 2 : 5 (b) 1 : 9 (c) 2 : 7 (d) 1: 10
A.9. (b)
Explanation:
Upcoming Engineering Exam Dates:
MHT CET 2023: Applications, Eligibility, Exam Pattern, Syllabus, Tips
VITEEE 2023 Registration Has Begun – Check Steps to Register, Eligibility Criteria, Exam pattern
WBJEE 2023 Exam Dates, Application Procedure, Eligibility Criteria, Exam Pattern
Q.10. A parallel plate air capacitor has a capacitance C. When it is half-filled with a dielectric of dielectric constant 5, the percentage increase in the capacitance will be
(a) 400% (b) 66.6% (c) 33.3% (d) 200%
A.10. (b)
Explanation:
Electrostatics Class 12 Questions and Answers PDF
Best JEE Books Recommended by JEE Toppers
Check out some of the best JEE Books recommended by JEE Toppers
- NCERT Textbook
One thing that is strongly recommended is that students prepare using NCERT textbooks. Toppers endorse NCERT as the finest book for JEE Main. NCERT is the foundation for these exams since they cover everything and consist of enormous information. Each and every line of NCERT must be clear and embedded in your mind to know the concepts better.
 |
NCERT At Your Fingertips As we mentioned in the point above, each and every line of NCERT is important. NCERT At Your Fingertips is just the book for that purpose as it has over 100 MCQs from every line of NCERT and provides deep learning. It has MCQs pulled out from NCERT, NCERT Exemplar, previous years’ papers, practice papers, and model test papers. The book is a bestseller on every e-commerce platform and has been referred by teachers and lakhs of JEE toppers and aspirants as a jewel for JEE exam preparation. It has over 8000 5-star ratings and reviews on amazon alone. You can’t miss out on this book for extensive knowledge.
|
|
JEE Main Guide This series has separate books for physics, chemistry, and mathematics. MTG JEE Main Physics is the best book for JEE Main exam based on the latest pattern. The book comprises detailed theory with illustrations followed by Self-check MCQs. Chapter-wise MCQs and Numerical Value Questions with Hints and explanations are included for better understanding. |
 |
|
|
22 Years JEE Main Imagine having 21 years’ worth of experience for JEE Main? That is what you’ll get with this series of Physics, chemistry, and mathematics books. MTG’s 22 Years JEE Main Chapter-wise Topic-wise Solutions Physics is the best question bank having questions from the past 22 years of JEE Main Physics (2022-2013) & AIEEE (2012-2002) which are segregated Chapter-wise Topic-wise. |
|
NTA JEE Main This book for excelling in JEE MAIN has the real 104 online papers by NTA from 2019 to 2023. The book also provides 5 Mock test papers as per the latest pattern of JEE Main exam set by NTA in the end. MCQs and Numerical type questions are present in the book along with chapter-wise graphical analysis indicating the weightage of questions and topics. |
 |
|
|
JEE Champion JEE Champion is a book designed for JEE aspirants to prepare better with the knowledge of topic importance within a chapter. It familiarizes all the JEE aspirants with a wide variety of questions frequently asked in various engineering entrance exams. It covers 10 years of questions for all the major engineering exams. Students can understand the changing pattern of questions asked and can gain mastery over questions asked during exams.
|
|
46 Years JEE Advanced • 46 years of IIT-JEE/ JEE Advanced previous year questions |
 |
|
|
46+22 Years Chapterwise Topicwise Solutions • 46 Previous Years’ Papers of JEE Advanced/IIT JEE |
Stay tuned for more questions and answers as we will update this page in the future.
