Learn Electrical Basics from Scratch

Explore the magnetic field, the region around a magnet where magnetic effects, including attraction, are felt, as a key concept in magnetic circuits.

Explore magnetic field strength, denoted by H, defined as the force on a unit at a point in a magnetic field, measured in tesla, with north-to-south direction and its formula.

Learn permeability as the key parameter of magnetic circuits, showing how materials carry flux lines and distinguishing high and low permeability, including free-space mu0.

Define absolute permeability as the ratio of magnetic flux density to magnetic field strength, denoted by mu, and compare it to air or vacuum permeability μ0 through key formulas.

Learn how magnetomotive force (mmf) drives current and magnetic flux, and how turns in a copper coil and current generate a magnetic field in a ferromagnetic core, forming an electromagnet.

Explain the series magnetic circuit and its contrast with parallel type, and show how a three part series circuit with lengths, areas, permeabilities, and reluctance forms an equivalent electric circuit.

Explore electromagnetic induction through Faraday's laws, showing how changing flux linkage induces voltage in coils or conductors, with applications in generators and alternators.

Learn how a magnetic hysteresis loop forms by recording instantaneous values of current, magnetic flux density, and magnetic field during magnetization and demagnetization, creating a loop.

Identify ac parameters: amplitude, instantaneous value, frequency, angular velocity, squared and average values, form factor, peak factor, and phase differences. Explore impedance, lagging and leading, and inductive and capacitive reactance.

See a cycle as a complete revolution in oscillation, totaling 360 degrees. It combines crest and drop to form a full circle, i.e., one complete evolution.

Solve a fundamental alternating current numerical by determining voltage, current, frequency, average current, peak factor, and form factor from the given data. Compare with standard equation and verify the results.

Compute the average value, peak factor, form factor, frequency, time period, and phase difference for a 420-volt sinusoidal voltage, and analyze lagging phase in the given expression.

Solve a pure-resistive single-phase circuit with a 190 V, 50 Hz supply by calculating peak, rms, and average currents, and illustrating a phasor diagram and circuit diagram.

Explore a solved numerical on purely ac circuits by calculating capacitor reactance, peak current, rms current, and average current, and by constructing phasor diagram and circuit diagrams.

learners solve a single-phase circuit problem at 350 hertz with a 0.5 henry inductance, computing reactance, maximum current, average current, and a Fazer diagram, plus form factor.

Analyze a series rc circuit with 50 ohm resistance and 150 μf capacitor across 220 v at 50 hz, calculating xc, impedance, current, power factor, power, and circuit diagram.