Capacitance - Combinations, Dielectrics, Energy Stored
Physics · Grade 12 · Week 6 · 25 questions
This Grade 12 physics chapter on Capacitance is a consistent source of board questions on Combinations, Dielectrics, and Energy Stored. For JEE and NEET, this chapter is equally important — conceptual clarity plus quick numerical practice is key.
What you'll practise
- Identify Combinations
- Derive Dielectrics
- Calculate Energy Stored
- Solve CBSE board-pattern problems from capacitance including NCERT exemplar-level questions
All 25 questions in this Capacitance - Combinations, Dielectrics, Energy Stored quiz
Grade 12 Physics — Capacitance - Combinations, Dielectrics, Energy Stored: 25 practice questions with instant scoring and explanations.
- A dielectric is inserted to:
- Dielectric constant of vacuum κ = :
- Dielectric constant of water ≈ :
- Polar dielectrics have:
- Non-polar dielectrics develop:
- Polarization P is:
- Bound charges appear on:
- If charge Q on plates is held constant, inserting dielectric:
- If V is held constant, inserting dielectric:
- Work done on dielectric when inserted at constant V:
- Capacitor of capacitance 2 μF charged to 100 V. Charge = :
- Same capacitor: Energy stored = :
- Two capacitors 2 μF each in series: equivalent capacitance:
- Two capacitors 2 μF each in parallel: equivalent capacitance:
- Energy conservation on charge sharing between two capacitors:
- Van de Graaff generator produces:
- Breakdown voltage of air ≈ :
- Applications of capacitors:
- In capacitor circuits, DC cannot pass through a capacitor in:
- A capacitor acts as:
- Spherical capacitor of inner radius a, outer b: C = :
- Isolated sphere capacitance: C = :
- Cylindrical capacitor (length L, radii a < b): C = :
- Increasing dielectric κ by factor 5 (at constant V) increases Q by:
- A parallel-plate capacitor with area A, separation d, filled with two dielectrics κ₁ and κ₂ in series (each half):
Question 1 of 250 correct so far