Basic Electricity – SS1, SS2 & SS3 Curriculum; Scheme of Work; Assessment Tests

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ASSURE Educational Services has put-together the scheme of work for Basic Electricity – SS1, SS2 and SS3 based on the National Curriculum and the syllabus of WAEC and NECO. All the topics highlighted in the National Curriculum and the syllabus of WAEC and NECO have been accommodated in our Scheme of Work.

End of term Assessment Tests in SS1, SS2 and SS3 alongside Overall Assessment Tests are available. Schools may adopt our scheme of work because of its simplicity and ease of monitoring of academic activities.

The Scheme of Work stated below is inexhaustible. Schools are encouraged to input weeks and periods of completion of topics in accordance with the academic calendar, number of students and available classes.

SS1 Basic Electricity (1st Term Scheme of Work)

 Class Term Main Topic Sub-Topics Contents SS1 1st Term DIRECT CURRENT CIRCUIT THEORY (i) Structure of matter Qualitative treatment of the structure of atoms in relation to electric current. (ii) Resistors Types of resistors. Resistor colour code. Resistors in series and parallel. Power rating of resistors. (iii) Conductors and insulators (iv) Ohm’s law and Kirchhoff’s laws (v) Power and energy Definition, examples and characteristics. Qualitative treatments only. Treatment should include calculations. MAGNETIC FIELD AND ELECTROMAGNETISM (i) Fundamentals of magnetism Types of magnet. Magnetic properties of materials: magnetic flux, magnetic flux density, permeability, magnetomotive force and reluctance. (ii) Concept of Electric field Electric field and properties: electric flux, electric flux density, electric field strength, permittivity and dielectric constant, potential gradient. Comparison between magnetic and electric circuits (iii) Capacitors Types of capacitor. Capacitance and dielectric. Charge on capacitor, relationship between charge and applied voltage of a capacitor. Application of capacitors. Voltage rating. Series and parallel connection. Energy stored in a capacitor (E =  ½QV= ½CV2): simple calculations (iv) Electromagnetic field Magnetic field around a current-carrying conductor. Fleming’s Right Hand Rule Force on a current-carrying conductor in a magnetic field (F = BILsinθ). Lenz’s law and Faradays law. Emf induced in a coil (E = BLVsin) Simple calculations involving force and e.m.f. only. (v) Self and Mutual Induction Qualitative treatment of self and mutual induction. Energy stored in a coil (E = ½ LI2).Application of electromagnetism as found in electric bell, security alarm system, solenoid, loudspeaker, buzzer, moving-coil instruments etc.

SS1 Basic Electricity (2nd Term Scheme of Work)

 Class Term Main Topic Sub-Topics Contents SS1 2nd Term MEASURING INSTRUMENTS (i) Moving-coil instrument Construction, advantages and disadvantages. Conversion of moving-coil instrument to ammeter and voltmeter. Calculations of shunts and multipliers. (ii) Moving-iron instrument Construction, principles of  operation, advantages and disadvantages. (iii) Digital instrument Multimeter, voltmeter, ammeter etc. Advantages and disadvantages. DIGITAL ELECTRONICS (i) Binary number Conversion of decimal numbers to binary numbers and vice versa. (ii) Logic gates Series connection of switches – AND gate, parallel connection of switches – OR gate and inverter – NOT gate. Truth table for logic gates. General symbols for AND, OR, NOT, NAND and NOR gates. Boolean expression.

SS1 Basic Electricity (3rd Term Scheme of Work)

 Class Term Main Topic Sub-Topics Contents SS1 3rd Term ALTERNATING CURRENT CIRCUIT THEORY (i) Generation of e.m.f. in a single turn coil Plotting of labelled sinusoidal waveform for a complete cycle. (ii) A.C. quantities A.C quantities (r.m.s., peak and average values, form factor, cycle, period and frequency) (iii) RLC circuits Solution of problems involving RL, RC and RLC series circuits. Conditions for resonance. Phasor diagram of series resonance. TRANSFORMERS (i) Types of transformer Transformer construction Type based on (i) construction (shell and core) and (ii) function (current and voltage). (ii) Principles of operation of a transformer Operation and transformation ratio (iii) Losses and temperature rise in transformers Transformer losses (copper and iron) Effect of losses and temperature rise in a transformer. Qualitative treatment only. (iv) Efficiency of transformers Losses and efficiency of transformer (v) Cooling of transformers Methods of cooling. Need for cooling.

SS2 Basic Electricity (1st Term Scheme of Work)

 Class Term Main Topic Sub-Topics Contents SS2 1st Term POWER SUPPLY (i) Power supply units Power supply units: dry cell, solar cell, cadium cell and accumulator. Block diagram of d.c. power supply. Functions of blocks of power supply. (ii) Rectification Half-wave and full-wave rectifications. Filtration and stabilization. ELECTRICAL MACHINES (i) A.C. motors (Single phase) Types of single phase motor: split-phase, capacitor-start, capacitor-run. Application of single-phase motors. (ii) Alternators Principles of operation, parts and types. Relationship of speed, number of poles and frequency; f = Np/60 (Hz) (iii) A.C. motors (Three phase) Principles of operation, parts, type and application. Methods of starting: direct-on-line, star delta and auto transformer. (iv) D.C. generators Principles of operation, parts and methods of connecting field windings. (v) D.C. motors Principles of operation, parts, types (shunt, compound, series) and application.

SS2 Basic Electricity (2nd Term Scheme of Work)

 Class Term Main Topic Sub-Topics Contents SS2 2nd Term ELECTRICAL ENERGY SUPPLY (i) Generating station Methods of generating electrical power: diesel engine, steam engine, hydro-electric, nuclear, gas turbine. ELECTRICAL WIRING (i) Electrical installation Types of wiring: surface, conduit, trunking, ducting. Selection of materials, tools and accessories. Application of IEE wiring regulation regarding domestic installation (ii) Wiring Cables and accessories. Current-carrying capacity of cable. Wiring of lighting and socket outlets and connection of plugs. Conduit, surface, trunking and ducting installations. (iii) Protection Protective devices Fuses and circuit breakers Discrimination of protective devices (iv) Earthing Reasons for earthing. Methods of earthing. Earth loop impedance (v) Maintenance, Fault diagnosis and Repairs Types of fault: short circuit, open circuit and earth leakage. Methods of diagnosing and repair of faults in an installation and equipment such as fluorescent fitting, electric iron, electric fan, blender etc. (vi) Testing of an installation Continuity test, insulation resistance test, earth leakage test and polarity test. (vi) General Workshop Safety Application of electrical safety regulations.

SS2 Basic Electricity (3rd Term Scheme of Work)

 Class Term Main Topic Sub-Topics Contents SS2 3rd ELECTRICITY TRANSMISSION AND DISTRIBUTION (i) Transmission and Distribution of Electricity Layout diagram of high voltage overhead transmission system. Treatment of main components (towers, insulators and conductors) and functions. Detailed treatment of components not required. Operating voltage levels for transmission lines (132 kV and 330 kV) and the need for high voltage system should be emphasized. Layout diagram and main components of electricity distribution. Functions of substation components (transformers, feeders etc.) MAINTENANCE AND REPAIR OF VARIOUS ELECTRICAL APPLIANCES (i) Maintenance Types (predictive, preventive and corrective) (ii) Maintenance and repair of electrical appliances Common faults that occur in electrical appliances (blender, electric iron, electric kettle, toaster, fluorescent lamps etc) such as short circuit, open circuit, earth fault etc.

SS3 Basic Electricity Scheme of Work – Practical Class ONLY…..for SS3 1st and 2nd term