Electrostatic Potential and Capacitance

  1. Define electric charge and its unit.
  2. What is the principle of conservation of charge?
  3. State Coulomb's law.
  4. Explain the superposition principle.
  5. Derive an expression for the electric field intensity at a point on the axial line of an electric dipole.
  6. What is the physical significance of an electric field line?
  7. Explain the concept of electric flux.
  8. State Gauss's law in electrostatics.
  9. What is the relation between electric field and potential difference?
  10. Derive an expression for the potential difference due to an electric dipole.
  11. What is the physical significance of equipotential surfaces?
  12. Explain the working principle of Van de Graaff generator.
  13. What is the principle of a capacitor?
  14. Derive an expression for the capacitance of a parallel plate capacitor.
  15. What is the physical significance of dielectric material in a capacitor?
  16. Derive an expression for the electric field intensity due to a uniformly charged infinite plane sheet.
  17. What is the principle of a capacitor and how does it store energy?
  18. Derive an expression for the energy stored in a capacitor.
  19. Explain the working principle of an RC circuit.
  20. Derive an expression for the time constant of an RC circuit.
  21. What is the physical significance of displacement current?
  22. State Ampere's circuital law.
  23. Derive an expression for the magnetic field due to a circular loop carrying a current.
  24. What is the principle of a moving coil galvanometer?
  25. Explain the working principle of a tangent galvanometer.
  26. Derive an expression for the magnetic field at the center of a circular loop carrying a current.
  27. State Biot-Savart law.
  28. Derive an expression for the magnetic field due to an infinitely long straight wire carrying current.
  29. What is the principle of an AC generator?
  30. Derive an expression for the EMF induced in a coil rotating in a magnetic field.
  31. What is Lenz's law and Faraday's law of electromagnetic induction?
  32. State Fleming's left-hand rule.
  33. What is the principle of a transformer?
  34. Derive an expression for the EMF induced in a secondary coil of a transformer.
  35. What is the physical significance of mutual inductance?
  36. What is the principle of a DC motor?
  37. Derive an expression for the torque on a rectangular coil placed in a uniform magnetic field.
  38. What is the principle of an AC motor?
  39. Derive an expression for the force on a charged particle moving in a magnetic field.
  40. What is the principle of a cyclotron?
  41. Derive an expression for the frequency of revolution of a charged particle in a magnetic field.
  42. What is the principle of a mass spectrometer?
  43. What is the physical significance of a magnetic field gradient?
  44. Derive an expression for the velocity selector.
  45. What is the principle of a Hall Effect experiment?
  46. Explain the working principle of a Hall probe.
  47. Derive an expression for the Hall voltage.
  48. What is the physical significance of eddy currents?
  49. State Lenz's law in the context of eddy currents.
  50. Explain the working principle of an induction furnace