Teacher explains RL, RC and RLC circuits. Students explain RL, RC, and RLC circuits. Calculator resistors, inductors, capacitors, AC source. Circuit diagrams, teacher demonstrates the operations of RL, Intructional Materials; RC, and RLC circuits.
CALCULATION OF CAPACITIVE REACTANCE AND INDUCTIVE REACTANCE (XC and XC)
Teacher calculates capacitive reactance and inductive reactance.
Students calculate Xc and XL in a circuit, e.g calculate XL in a circuit of frequency of 50HZ and inductance of 20H. Calculate XC in a circuit of frequency 10HZ and Intructional Materials; Capacitance of 100MF. Circuit Intructional Materials; Diagrams.
Concept of resonance frequency, series and parallel resonance.
Teacher explains resonance frequency, series and parallel resonance. Circuit diagrams. Students explain series and parallel Intructional Materials; Resonance.
Calculation of series and parallel resonance.
Teacher calculates series and parallel resonance students. Calculate series and parallel resonance.
Teacher explains the advantages and disadvantages of power factor correction.
Students state the advantages and disadvantages of power factor correction.
Intructional Materials; Chart on power triangle and power factor.
Teacher calculates power factor.
Students calculate power factor.
POWER IN AC CIRCUITS
Q factor and bandwidth.
Teacher explains Q-factor and bandwidth (FH and FL).
Students explain Q-factor and bandwidth.
Intructional Materials; Calculator, power triangle circuit diagram.
Concept of transistors.
Biasing of transistors.
Teacher explains the concept of transistors. Leads discussion on biasing of a transistor. Students explain the concept of transistors, draw the transistor symbols. Explain biasing arrangement, draw transistor biasing arrangements. Transistors e.g bipolar, FET, JFET, MOSFET etc. charts showing pictures of transistors, it symbols.
TYPES OF TRANSISTORS
Bipolar (NPN and PNP) transistor.
Field effect transistor (FET)
(N-channel and P-channel).
MOSFET transistors, meaning and symbols.
Teacher discusses basic bipolar transistor circuits. Explains types of transistors and symbols.
Students draw and explain common emitter collector and base circuits. State types of transistors and symbols.
Intructional Materials; Chart on types of transistors, biasing arrangements and bipolar transistor circuits.
APPLICATION OF TRANSISTORS,
(e.g- amplifiers, switches, etc).
Teacher states the application of transistors.
Students state the application of transistors charts on areas of application of transistors.
SS2 2ND TERM
INTEGRATED CIRCUITS (IC) AND MICRO PROCESSORS.
Concept of integrated circuits (IC).
Advantages and disadvantages of IC.
Teacher explains the concept of integrated circuit. Discusses the advantages and disadvantages of IC. Students participate in class, define IC, state the active and passive components of IC.
Intructional Materials; Charts on ICs and microprocessors.
INTEGRATED CIRCUITS (IC) AND MICRO-PROCESSORS.
Application of IC and microprocessors.
Teacher leads discussion on application of IC. Students state the application of IC.
Intructional Materials; Chart on areas of application of IC.
Intructional Materials; Charts showing different TRUTH tables.
AUTO MECHANICS WORK
SS 2 FIRST TERM
PETROL ENGINE – TWO STROKE CYCLE
Teacher define and explain two stroke cycle operation. Students examine the working sequence.
Resources; Live engine, i.e two stroke charts.
PETROL ENGINE – FOUR STROKE CYCLE.
Teacher explain and illustrate four stroke cycle engine. Students observe the working operation of four stroke.
Resources; Live engine, charts, posters.
PETROL ENGINE – ADVANTAGES OF FOUR STROKE AND TWO STROKE
Teacher distinguish between two stroke and four stroke cycle engine. Students observe the differences between two stroke and four stroke engine.
Resources; Charts, posters on spark ignition engine (SIE)
DIESEL ENGINE—TWO STROKE CYCLE AND FOUR STROKE CYCLE.
Teacher explain and illustrate the principles of operation of two & four stroke cycle engines, emphasize on the difference between the two. Students observe the operational sequence of tow stroke & four stroke cycle. Distinguish between the layout and advantages.
Resources; Live engine of compression ignition engine (CIE). Two and four stroke.
COMPONENTS OF A TRANSMISSION UNIT (CLUTCH) – IDENTIFICATION OF PARTS AND CHARACTERISTICS OF CLUTCHES.
Teacher illustrate with sketches, types of transmission components, i.e pressure plate, disc, release bearing.
Students make sketches on types of clutches. Observe the operation. Resources; Gearbox, posters, charts.
COMPONENTS OF A TRANSMISSION UNIT (CLUTCH) CONSTRUCTION AND OPERATION OF A SINGLE PLATE CLUTCH.
Teacher list various parts in a transmission system. Students identify transmission components.
Resources; Live vehicle, clutch , gearbox, posters, charts.
COMPONENTS OF A TRANSMISSION UNIT (GEAR BOX)—OPERATION OF A SLIDING MESH GEARBOX AND REVERSE MECHANISM.
Teacher dismantle and identify parts of gearbox, illustrate and explain. Students observe the operation, and the dismantling.
Resources; Live vehicle, gearbox, posters, charts, etc