Electrostatic Potential and Capacitance
Kerala Board · Class 12 · Physics
Quick revision notes for Electrostatic Potential and Capacitance — Kerala Board Class 12 Physics. Key concepts, formulas, and definitions for last-minute revision.
Key Topics to Revise
Electric Potential and Potential Difference
- Electric potential at a point is work done per unit charge in bringing a positive test charge from infinity to that point
- Electric potential is a scalar quantity measured in volts (V)
- Potential difference between two points is path-independent due to conservative nature of electric field
Potential Due to Different Charge Configurations
- Potential due to point charge follows inverse square law dependence
- For multiple charges, potential is algebraic sum (superposition principle)
- Dipole potential varies as 1/r² (faster decrease than point charge)
Conductors in Electrostatic Equilibrium
- Electric field inside conductor is zero in electrostatic equilibrium
- All charges reside on the outer surface of conductor
- Electric field just outside conductor surface is perpendicular to surface
Capacitance and Capacitors
- Capacitance C = Q/V is ratio of charge to potential difference
- Capacitance depends on geometry and dielectric material, not on Q or V
- Parallel plate capacitor: C = ε₀A/d (air) or C = Kε₀A/d (dielectric)
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Electrostatic Potential and Capacitance covers several key topics that are frequently asked in Kerala Board Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
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Sources & Official References
- Kerala Board of Public Examinations — keralapareekshabhavan.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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