Physics · Class 12 · Chapter 1
Electric Charges and Fields
13 lessons123 min7 simulations10 practice questions
This chapter is electrostatics: charges at rest and the forces and fields they produce. It starts with what charge is and how bodies get it, sets out its three properties (additivity, conservation, quantisation), states Coulomb's law and the superposition principle, and then builds the electric field, field lines, electric flux, the electric dipole and Gauss's law, which it uses to find the field of a long wire, a flat sheet and a spherical shell.
Also called: electrostatics · Coulomb's law · Gauss's law · electric field
Lessons
13 lessons · 123 min
01Electric charge, conductors and insulatorsNCERT §1.2 and §1.37 min02Basic properties of electric chargeNCERT §1.47 min03Coulomb's lawNCERT §1.510 min1 sim04Forces between multiple chargesNCERT §1.69 min1 sim05Electric fieldNCERT §1.77 min06Electric field linesNCERT §1.810 min1 sim07Electric fluxNCERT §1.97 min08Electric dipoleNCERT §1.1010 min1 sim09Dipole in a uniform external fieldNCERT §1.1111 min1 sim10Continuous charge distributionNCERT §1.127 min11Gauss's lawNCERT §1.1310 min1 sim12Applications of Gauss's lawNCERT §1.1411 min1 sim13Chapter reviewMust-know facts, traps and formulas17 min
Simulations
7 in this chapter
Coulomb's law between two charged spheresIn: Coulomb's lawAdding the forces from several chargesIn: Forces between multiple chargesField lines of two chargesIn: Electric field linesHow fast a dipole's field falls offIn: Electric dipoleTorque on a dipole in a uniform fieldIn: Dipole in a uniform external fieldFlux through a closed surfaceIn: Gauss's lawFields from Gauss's lawIn: Applications of Gauss's law