15/15 weeks ready · Follows the order of the Egyptian Ministry of Education and Technical Education textbook Physics, Third Secondary Year (Grade 12), Unit 1 Dynamic Electricity and Electromagnetism (English and Arabic editions, 2026–2027 printing; the book is one volume for the whole year and has no term marking, Darslab places Unit 1, Chapters 1–4, in Term 1 and keeps Unit 2 Introduction to Modern Physics for Term 2). All explanations, exercises and quizzes are Darslab’s own.
Term 1Unit 1 Dynamic Electricity and Electromagnetism: Chapter 1 Electric Current and Ohm’s Law (with Kirchhoff’s laws), Chapter 2 Magnetic Effects of Electric Current and Measuring Instruments, Chapter 3 Electromagnetic Induction, Chapter 4 Alternating Current Circuits; Term 1 review
1
Current, resistance, series and parallel Chapter 1 Electric Current and Ohm’s Law (A): what the book revises (current, potential difference, emf, resistance and resistivity, conductivity, Ohm’s law, conventional current), then resistors in series and in parallel and their equivalent resistance
The emf, internal resistance and the closed circuit Chapter 1 (B): the emf of a cell and its internal resistance, Ohm’s law for a closed circuit I = VB/(R + r), terminal voltage V = VB − Ir and the emf as the open-circuit voltage, worked circuits (series, parallel, series-parallel, internal resistance)
Kirchhoff’s two laws Chapter 1 (C): Kirchhoff’s first law (conservation of charge, the node rule) and second law (conservation of energy, the loop rule), the guidelines for assumed current directions and signs, and three worked multi-loop circuits
The magnetic field of a wire and of a loop Chapter 2 Magnetic Effects of Electric Current and Measuring Instruments (A): Oersted’s observation, the field of a straight wire (flux density B = μI/2πd, Ampere’s right-hand rule) and of a circular loop (B = μNI/2r, the right-hand screw rule, the loop as a magnetic dipole)
The solenoid, the force on a wire and parallel wires Chapter 2 (B): the solenoid (B = μnI = μNI/ℓ, poles by the screw rule), the force on a current-carrying wire in a magnetic field (F = BIℓ sin θ, Fleming’s left-hand rule, the tesla) and the force between two parallel wires
Torque on a coil and the moving-coil galvanometer Chapter 2 (C): worked force problems, the torque on a rectangular coil (τ = BIAN sin θ, the magnetic dipole moment) and the moving-coil galvanometer (construction, radial field, sensitivity)
From galvanometer to ammeter, voltmeter and ohmmeter Chapter 2 (D): the galvanometer as an ammeter (shunt) and a voltmeter (multiplier), the ohmmeter and its non-linear scale, analogue and digital multimeters; the chapter summary and exercises (pp. 52–58) are not used
Faraday, Lenz and mutual induction Chapter 3 Electromagnetic Induction (A): Faraday’s experiment and the induced emf, Faraday’s law emf = −N ΔΦ/Δt, Lenz’s rule, Fleming’s right-hand rule, mutual induction (M, the henry as V·s/A) and the two-coil experiments
Self-induction, eddy currents and the AC generator Chapter 3 (B): self-induction (emf = −L ΔI/Δt, the henry), what the self-inductance depends on, eddy currents and induction furnaces, the emf in a straight wire moving across a field (emf = Bℓv sin θ), and the construction and emf of the AC generator
The sine wave, the DC generator and the transformer Chapter 3 (C): the sine wave of a generator and its frequency (50 Hz at home), the effective value (0.707 of the maximum), rectification and the DC generator (split-ring commutator), the transformer (turns, voltage and current ratios, step-up and step-down)
Power transmission, transformer efficiency and the DC motor Chapter 3 (D): transformers in power transmission (I²R loss) and their efficiency, the two transformer examples, the DC motor (construction, Fleming’s left-hand rule, the commutator, one revolution, several coils, motor against galvanometer); the summary and exercises (pp. 86–96) are not used
Alternating current, resistors and coils Chapter 4 Alternating Current Circuits (A): the sine waveform, frequency (50 Hz in Egypt) and the advantages of AC, why a moving-coil ammeter fails and the hot-wire ammeter, voltage and current in a resistor (in phase) and in a coil (voltage leads by 90°), inductive reactance XL = 2πfL, coils in series and parallel
The capacitor, reactance and impedance Chapter 4 (B): the capacitor (Q = CV) on DC and on AC (the current leads, the voltage lags by 90°), capacitive reactance XC = 1/2πfC, capacitors in series and in parallel, impedance and the series RL circuit (Z = √(R² + XL²), phase angle, voltages add as vectors)
RC and LCR circuits, oscillations and resonance Chapter 4 (C): the series RC and LCR circuits (Z = √(R² + (XL − XC)²), the phase angle and the three cases, power only in the resistor), the oscillating LC circuit and f = 1/2π√(LC), resonance and the tuned circuit of a radio; the summary and exercises (pp. 114–116) are not used
The Egyptian Ministry of Education and Technical Education (MOETE) is not affiliated with, and does not endorse, Darslab. Lessons follow the order of the Ministry’s textbooks; all explanations, exercises and quizzes are Darslab’s own. Pictures of animals, plants and objects: Twemoji, CC BY 4.0.
