Electrical Engineering

Explore electricity as a natural phenomenon driven by free electrons, distinguishing static from dynamic electricity and AC versus DC, with AC at 50 or 60 Hz.

Explain emf as a specific voltage that drives current, compare ac and dc waveforms at 50 or 60 hz, and show how voltage, current, impedance, phase, and energy determine power.

Explore electrical resistance as the material opposition to current, distinguishing conductors, insulators, and semiconductors, and apply ohm's law and impedance concepts in AC circuits.

Discover the three main electricity production technologies: electrochemical batteries, solar systems, and electromagnetic induction, and explore diesel, wind, hydro, nuclear, and gas/thermal turbine options.

Explore wind and hydro turbine technologies that convert wind and water flow into electricity, using turbines, gearboxes, and generators, and compare nuclear, gas, thermal, and combined cycle plants.

Explore resistive, inductive, and capacitive loads in dc and ac circuits, applying Ohm's law to relate voltage, current, resistance, and reactance, with phase: resistive in phase, inductive lag, capacitive lead.

Explore how alternating current powers generation and transmission and how transformers enable voltage up or down for efficient distribution, with single-phase and three-phase sinusoidal waveforms.

Current in a coil generates a magnetic field and electromagnet; B grows with turns and current. Moving conductors in a field induce EMF, depending on flux, velocity, and turns.

Explore the voltage classification system, from low voltage up to ultrahigh voltage, and relate distribution networks to low and medium voltage with transmission for high, extra high, and ultrahigh levels.

Learn electrical power in dc and ac circuits, derive p = v^2 / r or p = i^2 r, and analyze active, reactive, and apparent power via the power triangle.

Master power factor concepts by applying Pythagoras to real, reactive, and apparent power with S = sqrt(P^2+Q^2) and impedance Z = R + jX, then compute energy in kilowatt-hours.

Determine the initial and target power factors, compute the reduced reactive power, and derive the capacitor bank value for power factor correction in a three-phase system.

Understand how harmonics, as integer-multiple components of a signal, distort waveforms and degrade power quality, and learn how harmonic filters mitigate these effects in modern non-linear loads.

Understand voltage drop as the decrease in electrical potential along a path due to resistance and impedance, and how high voltage transmission with larger cable cross sections reduces loss.

Study how load balance distributes apparent power across three phases and how unbalance percentage is calculated using a formula. Ensure correct phase sequence to control motor rotation direction.

Derive delta-to-star impedance conversion: compute z1, z2, z3 from za, zb, zc; in balanced banks za=zb=zc, so z1=z2=z3=zy and z equals z delta divided by three.

Identify the earthing system components, including protective conductors, copper earthing roots, clamps, and earthing enhancement materials, and compute resistance using the given formula to meet targets.

Explain earthing system connections and ts and tc combinations, detailing how the source of supply, the installation, and earth or neutral are connected, separated, or combined.