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BASIC ELECTRICITY

SS 1 SECOND TERM
 WEEK TOPIC/CONTENT ACTIVITIES 1 RESISTANCE -Definition of resistance -Connection of resistors in series -Connection of resistors in parallel -Connection of resistors in series-parallel Demonstrate different connection of resistors, compute values of voltage across current flowing, and total resistance for each connection type. 2 RESISTIVITY AND CONDUCTIVITY -Definition of resistivity and conductivity, symbols and units. -Verification of resistivity and conductivity by experiments. Carry out experiment to demonstrate resistivity and conductivity 3 CAPACITANCE Definition of capacitance, unit and symbol. Connection of capacitance in series, parallel and series-parallel. Illustrate different connection of capacitors, demonstrate the different connections of capacitors. 4 INDUCTANCE Definition of inductance, unit and symbol Connection of inductors in series, parallel and series-parallel. Illustrate different connection of inductors, demonstrate different connection of inductors. 5 REACTANCE AND IMPEDANCE . Definition of capacitive . Definition of inductive reactance . Definition of impedance Interrelate impedance with inductive capacitive reactance. 6 ALTERNATING CURRENT TERMINOLOGIES -Explanation of term associated with alternating current e.g. peak value, RMS and average. -Waveforms of alternating currents -Calculation of RMS values from peak values. Draw AC waveform and indicate the position of the related term, produce experimentally alternating current waveform. 7 KIRCHOFF’S CURRENT LAW -Kirchhoff’s current law. -Application of Kirchhoff’s current law to solve simple network equations. Carry out experiment to verify Kirchhoff’s current law. 8 KIRCHOFF’S VOLTAGE LAW -Kirchhoff’s voltage law -Application of Kirchhoff’s voltage law to solve simple network equation. Carry out experiment to verify Kirchhoff’s voltage law. 9 MAGNETS -Origin of magnets. -Description of magnets. -Properties of magnets. Demonstrate the drawing of magnetic lines of flux. 10 MAGNETS -Characteristics of magnets -Application of magnets Utilization of magnets to generate EMF. Use magnets to generate EMF, calculate the distance between the poles of a magnet. 11 Revision Revision 12-13 General Revision General Revision 14 Examination Examination

BASIC ELECTRICITY

SS 1 THIRD TERM
 WEEK TOPIC/CONTENT ACTIVITIES 1 ELECTRO-MAGNETISM -Concept of electromagnetism Faraday’s laws of electromagnetism. Demonstrate Faraday’s law using finger and a conductor. 2 ELECTROMAGNETISM -Lenz’s law of electromagnetism induction. -Application of electromagnetism Verify the laws of electromagnetic induction by experiments, produce a prototype of a motor using an electromagnet. 3 TRANSFORMERS -Definition of transformer -Classification of transformers -Operational principles of transformers. Illustrate the operational principles of transformers. 4 TRANSFORMERS Constructional features of transformer. Produce a working prototype of a transformer. 5 TRANSFORMERS -Transformer efficiency -Transformer loss Application of transformers. Compute transformer turn ratio, carry out stepping down, and stepping up of transformers. 6 POWER SUPPLIES -Definition of power supply -Component parts of power supply unit. Functions of power supply unit. Demonstrate the use of DC power supply. 7 CONVERTERS -Definition of converter -Types of converter Illustrate various types of converters. 8 INVERTERS -Definition of inverters -Function of inverter. -Differences between inverters and converters. Demonstrate the use of inverter. 9 RECTIFICATION -Definition of rectification. -AC to DC rectification. -Types of rectifier circuit Draw the diagram of various rectifier circuits. 10 FILTRATION -Definition of filtration -Types of filter circuits -Uses of filters. Conduct experiment to demonstrate the operations of rectifier/filter circuits. 11 Revision Revision 12-13 Revision Revision 14 Examination Examination

BASIC ELECTRONICS

SS 1 FIRST TERM
 WEEK TOPIC/CONTENT ACTIVITIES 1 ELECTRIC CURRENT Structure of atom Teachers explain the structure of atom. Students draw the structure of atom chart showing structure of an atom. 2 CONDUCTORS AND INSULATORS Teacher; defines and explains conductors and insulators. List examples of conductors and insulators. Students; draw the structure of an atom in conductors and insulators. 2. Distinguish between conductors and insulators, participate in class discussion. Instructional Materials; Copper, wire, pieces of wood or rubber. 3 APPLICATION OF CONDUCTORS AND INSULATORS. Teacher leads the discussion on various uses of conductors and insulators. Students identify various objects made of conductors and insulators or charts showing materials made of insulators and conductors. 4 ELECTRIC CURRENT Direct and alternating current. Teacher; defines and explain with relevant diagrams, direct and alternating current (AcaDc). Students to distinguish between asking and answering question . Instructional Materials; Dry cells, battery charts showing various sources of alternating current. 5 ELECTRIC CURRENT Differences between current (D.C) and alternating current Teacher; guides the students to distinguish between direct and alternating current. Students; state the difference between direct and alternating current. Instructional Materials; dry cells, batter, charts, showing various sources of alternating current. 6 ELECTRIC CURRENT Sources of direct and alternating current. Teacher; explains sources of direct and alternating current. Students; mention two sources of alternating current. Instructional Materials; Dry cells, battery, charts, showing various sources of alternating current. 7 RELATIONSHIP BETWEEN VOLTAGE CURRENT AND RESISTANCE. Current, voltage, and resistance Teacher; defines and explains current, voltage and resistance. Students; define current voltage and resistance. 8 RELATIONSHIP BETWEEN VOLTAGE, CURRENT AND RESISTANCE Measurement of voltage, current and resistance. Teacher; state units, symbols, and instruments for measuring voltage, current, and resistance. Demonstrates using instrument to measure voltage, current and resistance (practical). Students; to measure current, voltage and resistance. Instructional Materials; resistors, resistor boxes, connecting wires, circuit boards, dry cells, ammeter, ohmmeter, and voltmeter. 9 RELATIONSHIP BETWEEN VOLTAGE CURRENT AND RESISTANCE Ohm’s law Definition of ohm’s law. Mathematical expression for ohm’s law. Teacher; states and explains ohm’s law. Students; state ohm’s law. State the mathematical expression for ohm’s law. Instructional Materials; calculator, charts on ohm’s law. 10 RELATIONSHIP BETWEEN VOLTAGE, CURRENT, AND RESISTANCE Simple experiment to determine ohm’s law Teacher; performs an experiment to demonstrate ohm’s law. Students; perform experiment on ohm’s law. Take readings and draw graph to determine voltage, current and resistance. Instructional Materials; resistors, resistor boxes or variables resistors, connecting wires, dry cells, ammeter, ohmmeter, and voltmeter, graph sheet and calculator. 11 RELATIONSHIP BETWEEN VOLTAGE, RESISTANCE AND CURRENT Simple calculation of current, voltage and resistance in a given circuit. Teacher; calculates current, voltage and resistance in a given circuit. Students; calculate voltage in a circuit where current of 5A flows and the circuit resistance is 10 ohms Instructional Materials; calculators, circuit diagrams. 12 Revision Revision 13 Examination Examination 14 Examination Examination

BASIC ELECTRONICS

SS 1 SECOND TERM
 WEEK TOPIC/CONTENT ACTIVITIES 1 ELECTRIC POWER Concept of electric power Teacher; defines and explains electric power. 2 ELECTRIC POWER Relationship between power, current and voltage. Teacher; states the relationship between power, current and voltage (P=IV). Students; state the formula for guiding power. Calculate power in given circuit. Instructional Materials; Calculator, charts containing power formulas. 3 ELECTRIC POWER Deriving power for electric power, and calculation of power in given circuits. Teacher; derives other formula for finding power. E.g P=I2 R, etc, units. Students; calculate power in given circuits. E.g. calculate power expanded in a circuit of voltage 240V and current 10 Amps. Calculator, chart containing power formulas. Teacher; calculate power in given circuits. Students; calculates power in given circuits. Instructional Materials; Calculator, charts containing power formulas, circuit diagrams. 4 CIRCUIT COMPONENTS Concept of resistors. Symbols, sign and unit of resistance. Teacher explains the concepts of resistors, types of resistors. Students listen attentively. Identify various types of resistors. Instructional Materials; Assorted resistors. Draw symbols and sign of resistance. 5 CIRCUIT COMPONENTS Resistance colour coding and rating. Calculation of resistance. Teacher; explains resistors, colour coding and rating. Calculate resistance from resistor colour coding. Students; calculate value of resistance from given resistor colour codes. Instructional Materials; Assorted resistors, charts showing resistor colour codes. 6 CIRCUIT COMPONENTS Capacitors and inductors. Teacher; explains capacitors and inductors. Students state the types of capacitors and inductors. Draw the symbols and signs of capacitors and inductors. Instructional Materials; Assorted capacitors and inductors. 7 CAPACITOR COLOUR CODING AND CALCULATION. INDUCTOR CALCULATION Teacher; explains capacitors colour coding and rating, inductor rating. Calculation of capacitors in series, parallel and series parallel. Calculation of inductors in series, parallel and series- parallel. Students assisted to calculate values for capacitance and inductance. Instructional Materials; Assorted capacitor, inductors circuit diagram. 8 ELECTRIC CIRCUIT ELECTRIC CIRCUIT- BASIC COMPONENTS OF ELECTRIC CIRCUIT. (RESISTANCE, VOLTAGE AND CURRENT). Teacher; explains electric circuit, different circuit boards, (e.g. veroboard, printed circuit board (PCB). Students; identify electric circuit, and different types of circuit board. Identify basic components of electric circuit. Instructional Materials; Different circuit boards, circuit diagrams. 9 ELECTRIC CIRCUIT CIRCUIT ARRANGEMENT Series, Parallel, and Series- parallel. Wiring of the different circuit arrangements. Teacher; explains each circuit arrangement. Students; identify the three circuit arrangements. Carryout practical wiring of different circuit arrangement. Instructional Materials; Assorted resistors, cells, connecting wires, circuit boards, voltmeter, Ammeter, Ohmmeter, etc. 10 SIMPLE CALCULATION ON CIRCUIT ARRANGEMENT. Calculation involving series arrangement. Calculation involving parallel arrangement. Calculation involving series parallel. Teacher; performs simple calculations for different circuit arrangements. Students calculate resistance in series, parallel, and series-parallel arrangement. Instructional Materials; Charts showing different circuit arrangements. 11 Revision Revision 12 Examination Examination