← General Physics: Electricity and Magnetism

⇄ Sync
Length

Program
History and progress transfer
Choose a topic — problems will keep coming one after another for as long as you like

Theory of all steps of the program by blocks. Open a topic to read it.

How a session goes

A session is 10–90 minutes: a warm-up on what you've learned, new steps with short theory and problems, practice. Each problem gives two tries: 100 points on the first, 60 on the second; after the second mistake the correct answer is shown. You move on in the program if 70 % of the problems are solved.

Problems with numbers are generated anew every time a step is repeated. A fractional answer can be entered with a comma, a point or as a fraction: 0,5, 0.5, 1/2. In Practice any topic is available without a timer.

About the course

Field and potential, Gauss's law, capacitors and dielectrics, field energy. Direct current, Kirchhoff's rules, the RC circuit. The Biot–Savart law, Ampère's circuital law, the Lorentz and Ampère forces. Electromagnetic induction, self-inductance, the LC circuit, alternating current and impedance, Maxwell's equations.

Course program: 35 lessons

The electrostatic field

  1. Coulomb's law and the superposition principle
  2. Field of a system of charges. The dipole
  3. Flux of E and Gauss's law
  4. Potential, work of the field, equipotentials
  5. Electrostatics: more practice
  6. Checkpoint: the electrostatic field

Conductors, capacitors, dielectrics

  1. Conductors in a field and capacitance
  2. Combinations of capacitors
  3. Dielectrics and the vector D
  4. Energy of a capacitor and energy density of the field
  5. Capacitors: more practice
  6. Checkpoint: capacitors and dielectrics

Direct current

  1. Current density, Ohm's law, resistivity
  2. Emf, Ohm's law for a complete circuit, Joule's law
  3. Kirchhoff's rules
  4. Charging and discharging a capacitor
  5. Direct current: more practice
  6. Checkpoint: direct current

The magnetic field

  1. The Biot–Savart law
  2. Ampère's circuital law: solenoid and toroid
  3. Ampère force, magnetic moment, magnetic materials
  4. Lorentz force and the motion of charged particles
  5. Magnetic field: more practice
  6. Checkpoint: the magnetic field

Electromagnetic induction

  1. Faraday's law and Lenz's law
  2. Self-inductance, inductance, the RL circuit
  3. Magnetic field energy, mutual inductance, the transformer
  4. Induction: more practice
  5. Checkpoint: electromagnetic induction

Oscillations, alternating current, Maxwell's equations

  1. The LC circuit and damping
  2. Alternating current: reactances, impedance, phase shift
  3. Resonance, rms values, power
  4. Displacement current and Maxwell's equations
  5. Oscillations and alternating current: more practice
  6. Checkpoint: oscillations, alternating current, Maxwell