Subject overview
Electricity & Magnetism
Explore DC and AC circuits, transformers, magnetic fields, capacitors, inductors, resonance, filters and three-phase systems. Calculate with SI units, formulas and circuit diagrams.
Subtopics
09 SUBTOPICSDirect Current
Ohm’s law, electrical power, loaded and unloaded voltage dividers, resistor networks and star–delta conversion.
Subtopics03.2ExploreAlternating Current
Calculate and visualize sine, triangle, rectangle and pulse-width-modulated voltage waveforms.
Subtopics03.3ExploreMagnetism
Linear magnetic circuits, flux, field strength, reluctance and Faraday’s law.
Subtopics03.4ExploreCapacitors
Charge, stored energy, plate geometry, electric fields, AC circuits and RC transients.
Subtopics03.5ExploreInductors
Inductance, magnetic energy, transformers, induced EMF, AC circuits and RL transients.
Subtopics03.6ExploreResonant Circuits
Series and parallel RLC resonance, quality factor, bandwidth and frequency-dependent impedance.
Subtopics03.7ExploreGain & Attenuation
Voltage, current and power ratios expressed as gain and attenuation in decibels.
Subtopics03.8ExploreFilters
Unloaded RC and RL high-pass and low-pass filters, cutoff frequency, gain and output phase.
Subtopics03.9ExploreThree-Phase Systems
Balanced star and delta connections, three-phase power and generator phase voltages separated by 120 electrical degrees.
Subtopics