These comprehensive notes cover essential concepts of electrostatics for JEE Advanced preparation. Topics include Coulomb's Law, Electric Field and Potential, Gauss's Law, Capacitance, and Electric Dipole. Each section is designed to build a strong foundation with clear explanations, important form...
- Electrostatics deals with the study of forces, fields, and potentials arising from static charges.
2. Coulomb's Law
- States that the force F between two point charges q1 and q2 is directly proportional to the
product of the magnitudes of the charges and inversely proportional to the square of the distance r
between them.
F = ke (q1 q2 / r^2)
- Here, ke is the electrostatic constant, ke = 1 / (4 pi epsilon_0), and epsilon_0 is the permittivity of
free space.
3. Electric Field (E)
- The electric field at a point is defined as the force per unit positive charge placed at that point.
E=F/q
- For a point charge q, the electric field at a distance r is:
E = ke (q / r^2) r_hat
- Superposition principle for electric fields: The net electric field due to multiple charges is the
vector sum of the electric fields due to individual charges.
4. Electric Field Lines
- Electric field lines are imaginary lines that represent the direction of the electric field at various
points in space.
- Properties:
- They originate from positive charges and terminate on negative charges.
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