Class 12 Physics — Chapter 1: Electric Charges and Fields
90 practice questions · 30 Easy · 30 Medium · 30 Hard
Practise Class 12 Physics Chapter 1, "Electric Charges and Fields", with 90 NCERT-aligned multiple-choice questions. The set is split into 30 Easy, 30 Medium and 30 Hard questions, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams, JEE Main, JEE Advanced and NEET UG.
"Electric Charges and Fields" is one of the chapters where numerical problem-solving, derivations and conceptual application really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+2 correct, −1 wrong, 0 skipped), training the same accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on Electric Charges and Fields, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 12 Physics mastery score. A few sample questions are shown below; sign in free to practise all 90.
Key concepts: Electric Charges and Fields (Class 12 Physics)
This chapter covers electric charge, Coulomb's law, the electric field and field lines, electric dipoles, and Gauss's law with its applications.
- Charge & quantisation
- Charge is conserved and quantised (q = ne); like charges repel, unlike attract.
- Coulomb's law
- The force between two point charges is proportional to the product of charges and inversely proportional to the square of the distance.
- Electric field
- E = F/q₀ is the force per unit positive test charge; represented by field lines that start on + and end on − charges.
- Electric dipole
- Two equal and opposite charges separated by a distance; it has a dipole moment p and experiences a torque in a uniform field.
- Gauss's law
- The net electric flux through a closed surface equals the enclosed charge divided by ε₀; used to find fields of symmetric charge distributions.
Key formulas — Electric Charges and Fields
💡 Exam tips for Electric Charges and Fields
- Use Gauss's law (not Coulomb's law) for symmetric distributions — sphere, line, sheet.
- Field due to an infinite sheet is uniform (E = σ/2ε₀) and independent of distance.
Sample questions
The SI unit of electric charge is:
1 coulomb = 1 ampere × 1 second.
Electric field due to a point charge q at distance r is:
E = kq/r², where k = 1/(4πε₀).
Electric field on the axis of an electric dipole at distance r (r ≫ a) is:
Axial field of a short dipole: E_axial = 2kp/r³ (k = 1/(4πε₀), p = dipole moment).
Electric Charges and Fields — FAQs
What are the key concepts in Class 12 Physics Electric Charges and Fields?+
This chapter covers electric charge, Coulomb's law, the electric field and field lines, electric dipoles, and Gauss's law with its applications. Key ideas include Charge & quantisation, Coulomb's law, Electric field, Electric dipole, Gauss's law.
What does Class 12 Physics Chapter 1 (Electric Charges and Fields) cover on XamBaaz?+
It covers 90 NCERT-aligned MCQs on "Electric Charges and Fields" — 30 Easy, 30 Medium and 30 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams, JEE Main, JEE Advanced and NEET UG.
Are these "Electric Charges and Fields" questions free to practise?+
Yes — sign in with Google to practise "Electric Charges and Fields" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "Electric Charges and Fields" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
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