Dielectric on page 41 refers to the insulating material in a capacitor — Page 282, Lesson 289

This is the index section of your book — it lists topics alphabetically with the page numbers where they appear. I'll walk you through the entries that fall under D, E, and F, so you know what's in store as you study. Starting with D: Cycle appears on page 163 — that's likely a reference to AC cycles or engine cycles. Delta is listed on pages 190 and 192, which will be the delta connection in three-phase systems. Dielectric on page 41 refers to the insulating material in a capacitor. Differential Fault on page 202 is a type of electrical fault protection. Dipole on page 121 is an antenna concept. Dog Clutch on page 196 is a mechanical coupling device used in some generator drives. Doping on page 252 is the process of adding impurities to a semiconductor. Drive Disconnect Unit on page 196 is the mechanism that disconnects the generator from its engine drive. Dummy Fuses on page 39 are placeholder fuses used for storage or to fill empty fuse positions. Moving to E: Earth Return on page 122 is a system where the aircraft structure serves as the return path for electrical current. Electric Motors on page 105 covers the principles of motor operation. Electrodes on page 53 are the conductive plates inside a battery. Electrolyte on page 53 is the chemical solution in a battery. Electromagnetic Indicators on page 115 are instruments that use electromagnetic principles to display information. Electromagnetic Induction on page 83 is the fundamental principle of generating voltage by moving a conductor through a magnetic field. Electromotive Force (EMF) on page 4 is the voltage generated by a source. Electron Flow on page 4 describes the actual movement of electrons through a circuit. Electrons on page 3 are the fundamental particles carrying negative charge. Electrostatic on page 165 relates to stationary electric charges. Emitter on page 258 is one of the three terminals of a transistor. Essential on page 129 refers to essential electrical buses or loads that must remain powered. Exciter Control Relay on page 204 controls the excitation current to the generator's field. EXCLUSIVE OR Gate on page 269 is a logic gate that outputs true only when inputs differ. Now F: FARAD on page 42 is the unit of capacitance. Faraday's Law on page 85 states that the induced EMF is proportional to the rate of change of magnetic flux. Field on page 85 refers to the magnetic field in a generator or motor. Flashing the field on page 90 is the process of applying a DC voltage to the field windings to restore residual magnetism. Fleming's Left Hand Rule on page 105 is used to determine the direction of motion in a motor. Fleming's Right Hand Rule on page 84 is used to determine the direction of induced current in a generator. Flux on page 71 is magnetic flux, measured in webers. Four Wire Star on page 191 is a three-phase star connection with a neutral wire. Frequency on page 164 is the number of cycles per second of an AC waveform. Frequency Wild on page 194 describes an alternator whose output frequency varies with engine speed. Full Wave Rectification on page 234 converts both halves of an AC waveform to DC. Fuses on page 37 are overcurrent protection devices. That's the full list of index entries for D, E, and F in this section. Each one points you to the page where the detailed explanation lives.