Electrostatics is an important chapter of Class 12 Physics that focuses on the study of electric charges at rest and the forces between them. In this chapter, students learn key topics such as Coulomb’s Law, electric field lines, electric flux, field of force, and Gauss’s Law. These notes include clear explanations, solved MCQs, short questions, long questions, and numerical problems to help students prepare effectively for exams and improve their understanding of electrostatics concepts.
📥 Download Class 12 Physics Electrostatics Notes
Skip to PDF contentYou can easily download the complete Electrostatics Notes PDF for Class 12 Physics from the link below. These notes are specially prepared according to the board syllabus and are perfect for exam preparation, concept revision, and numerical practice.
👉 Download PDF: Click here to download Class 12 Physics Chapter Electrostatics Notes
What’s included in this PDF:
- Complete Electrostatics Chapter Notes
- Solved MCQs
- Important Short Questions
- Detailed Long Questions
- Exercise Solutions for quick revision
❓FAQ – Class 12 Physics Chapter Electrostatics
Q1: What is Electrostatics in Class 12 Physics?
Answer: Electrostatics is the branch of physics that deals with the study of electric charges at rest and the forces between them.
Q2: What does Coulomb’s Law explain?
Answer: Coulomb’s Law explains the force of attraction or repulsion between two electric charges and how this force depends on the distance between them.
Q3: What are electric field lines?
Answer: Electric field lines are imaginary lines that show the direction and strength of an electric field around a charged object.
Q4: Name two applications of electrostatics in daily life.
Answer:
- Xerography (Photocopier): It uses a charged selenium drum to form images on paper by attracting charged toner particles.
- Inkjet Printer: It uses electric charges to control and direct tiny ink droplets onto paper to create images and text.
Q5: Why is Gauss’s Law important?
Answer: Gauss’s Law is important because it helps calculate electric fields easily, especially for symmetrical charge distributions.
Q26: State Gauss’s Law.
Answer:
👉 Gauss’s Law states: The electric flux through any closed surface is equal to 1/ε₀ times the total charge enclosed within that surface.
Mathematical Form:
Φ = Q_enclosed / ε₀
Electrostatics
1. Coulomb’s law states that the electrostatic force between two point charges is:
(a) Directly proportional to distance
(b) Inversely proportional to distance
(c) Directly proportional to product of charges and inversely proportional to square of distance ✅
(d) Independent of distance
2. Electric flux through a vector area A in a field of intensity E is:
(a) Φ = E / A
(b) Φ = EA cosθ ✅
(c) Φ = E + A
(d) Φ = E²A
3. Capacitance of a parallel plate capacitor is:
(a) C = Q / V ✅
(b) C = V / Q
(c) C = Q * V
(d) C = V² / Q
4. Coulomb’s law was discovered by:
(a) Faraday
(b) Coulomb ✅
(c) Ampere
(d) Ohm
5. SI unit of electric flux is:
(a) N / C
(b) N·m² / C ✅
(c) C / m²
(d) Volt