Electrostatics

Electric Charges and Fields

Electric Charges

1. Electric Charges
   • Types of charges
   • Convention for charges
   • Polarity of a charge
   • Nature of force between them
   • Unit and dimension, Scalar/vector
   • Static charges and charges in motion
   • Defining Electrostatics
2. Origin of charges
3. Types of materials – basis of passage of charges through them
4. Electrification of a body
   • By friction/rubbing
   • By transfer
   • By induction
   • Factors affecting electrification of a body
5. Electric discharge
   • Grounding/earthing
6. Detection of charge on a body
   • Apparatus
   • Working Principle
   • Set up
   • Function
7. Basic properties of electric charge
   • Additive nature of charges
   • Charges are Quantized.
   • Conservation of charge.

Coulomb’s Law

1. Point charges.
2. Coulomb’s Law
   • forces between two-point charges
   • Factors the force depends on
   • Electrostatic force is a conservative force
3. forces between multiple charges: superposition principle
4. discrete charges vs continuous charge distribution.

Electric field

1. Electric field due to a point charge,
   • source charge
   • test charge
   • Force on a charge due to electric field
   • electrostatic field inside a conductor is zero
2. Electric field lines.
3. Electric Dipole
   • Electric field due to a dipole.
   • Torque on a dipole in a uniform electric field.

Electric Flux

• Introduction to electric flux
• Gauss’s law
• Application of Gauss’s law to find field due to
  • infinitely long uniformly charged straight wire,
  • uniformly charged infinite plane sheet,
  • uniformly charged thin spherical shell.

Electric Potential and Capacitance

Electric Potential

• Electric potential energy of a charge in an electric field
• Electric Potential
  • Electric potential difference
  • Potential due to a Point Charge
  • Potential due to an Electric Dipole
  • Potential due to a system of charges
• Equipotential Surfaces
  • Relation between field and potential

Electric Potential Energy

• Potential energy of a system of charges
• Potential energy in an external field
  • Potential energy of a single charge
  • Potential energy of a system of two charges in an external field
  • Potential energy of a dipole in an external field

Electrostatics of Conductors