Module 3 Electrical Fundamentals study guide
Module 3 Electrical Fundamentals · Work through your exam, one topic at a time.
Module 3 Electrical Fundamentals is one of the foundational knowledge modules in the EASA Part-66 aircraft maintenance licence syllabus, and it underpins almost every later module a candidate will meet. It is written for trainee and practising aircraft maintenance engineers working toward a Category A, B1, B2 or B3 licence, and for anyone who needs to demonstrate a solid grounding in electrical principles before moving on to airframe, avionics or systems content. The Module 3 Electrical Fundamentals study guide has 12 sections and about 3,343 words.
01Electron Theory
Electron theory questions in Module 3 test your grasp of atomic structure, charge, and how charge movement defines current. You need to distinguish electron flow from conventional current direction, apply the coulomb, and recognise conductors, semiconductors, and insulators by their valence-electron behaviour.
318 words, about 2 min02Static Electricity and Conduction
Static electricity and conduction questions test how charge accumulates, how it moves, and how aircraft wiring and refuelling practice control it. You must distinguish charging by friction from induction, explain conduction in solids and electrolytes, and recognise electrostatic discharge hazards.
291 words, about 1 min03Electrical Terminology
Electrical terminology questions test unit fluency and correct use of symbols and formulas. You must handle SI prefixes, distinguish resistance from resistivity and conductance, and apply Ohm's law without mixing quantity names.
276 words, about 1 min04Generation of Electricity
Generation of electricity tests the practical sources of EMF and the magnetic induction principles behind aircraft generators. You must recognise friction, pressure, heat, light, chemical, and magnetic methods, and apply Faraday's and Lenz's laws.
282 words, about 1 min05DC Sources of Electricity
DC sources questions test cells, batteries, internal resistance, and connection arrangements. You must distinguish primary from secondary cells, calculate terminal voltage under load, and handle capacity and charging limits.
279 words, about 1 min06DC Circuits
DC circuits questions test series and parallel networks, Kirchhoff's laws, and meter behaviour. You must reduce networks to equivalent resistance and track which quantity is common in each connection.
303 words, about 2 min07Resistance and Resistors
Resistance and resistors questions test the dependence of resistance on material and dimensions, resistor identification, and temperature effects. You must use R = ρL/A, read colour codes, and select appropriate resistor ratings.
255 words, about 1 min08Power
Power questions test energy transfer rate in DC circuits and the relationship between voltage, current, and resistance. You must calculate power in different circuit arrangements and distinguish power from energy.
262 words, about 1 min09Capacitance and Capacitors
Capacitance questions test charge storage, capacitor combinations, energy, and transient behaviour. You must apply C = Q/V, combine capacitors correctly, and explain why capacitors block DC while passing AC.
255 words, about 1 min10Magnetism
Magnetism questions test magnetic poles, flux, flux density, electromagnets, and forces on current-carrying conductors. You must distinguish flux from flux density and apply the motor-effect relationship correctly.
269 words, about 1 min11Inductance and Inductors
Inductance questions test self- and mutual induction, back EMF, energy storage, and transient response. You must apply e = −L di/dt, combine inductors correctly, and explain why inductor current cannot change instantly.
265 words, about 1 min12AC Theory and AC Circuits
AC theory questions test sine-wave descriptions, RMS values, reactance, impedance, and phase relationships. You must convert between peak, RMS, and frequency values and calculate inductive and capacitive reactance.
288 words, about 1 min