Capacitors
Draw the graphic symbol for fixed and variable capacitors.
Identify types of capacitors.
Use multimeters to test capacitors.
Resistor
Draw the graphic symbols of various types of resistors.
Identify types of resistors and determine their ratings.
Use colour code to determine the value of carbon resistors.
Compare value of resistors from colour code calculation and multimeter reading.
Safety Checks in servicing Radio Receiver
Keep work area clean and well illuminated and ventilated.
Check dead and live circuits.
Discharge capacitor charges.
Discharge low and high voltage points.
Protect their eyes from molten solder and sudden explosion of power supply filter capacitor.
Handle the Electronic Measuring Instrument with care.
Electronic Measuring Instruments
Observe the necessary safety related to the use of Electronic Measuring Instrument such as Multimeter.
Use multimeter to measure the correct value of current, voltage, and resistance in active and passive electronic components and circuits.
Soldering and Desoldering in Electronic Circuit
State the precautions to be observed while soldering.
Desolder transistor, capacitor, and diode without damage.
List types of solder.
List types of flux.
Demodulation
Define Demodulation.
Name types of Demodulation.
Modulations
Define modulation
Explain types of modulation.
Sketch AM envelops.
Explain the function of Carrier wave in Radio Communication.
Transducers
State the definition of transducers.
State the function of
i) Loudspeaker.
ii) Microphone.
iii) Video Camera
iv) Video Display Unit. (Cathode Ray Tube (CRT)) and Liquid Crystal Display (LCD)
Electro-magnetic Spectrum
Define electromagnetic spectrum.
Classify frequency bands into :-
a) Very Low Frequency (VLF)
b) Short Wave (SW)
c) Very High Frequency (VHF)
d) Ultra High Frequency (UHF)
Indicate the applications of frequency ranges Freouencv Name, <30KHZ VLF, 30KHZ-300KHZ LF,
300KHZ-3M HZ MF, 3MHZ-30MHZ HF, 30MHZ-300MHZ VHF, 300MHZ-3GHZ UHF, 3GHZ-30GHZ SHF, 30GHZ-300GHZ EHF,
Electronic Communication Systems
Define Electronic communication system.
Draw the block diagram of an Electronic communication system.
State the function(s) of each block of the Electronic communication system.
Define noise in communication system.
Classify noise into two broad categories.
Semi-Conductor Diodes
Explain the operation of PN junction.
Explain the operation of semi- conductor diodes.
Define rectification and describe rectification in a diode circuit.
List types of semi- conductor diodes and their applications.
Photoelectric Devices
Define photo- electric device.
State the applications of photo- electric devices.
Concept of Emission
Define emission
State the types of emission.
State the applications of emission.
Meaning of Electronics and Electronic Circuit
Define electronics
Define electronic circuits.
Electronic Hand Tools
Identify and select common electronic hand tools.
State the uses of the electronic hand tools.
Sketch hand tools and label the parts.
Remove electronic components using suitable soldering equipments and techniques.
Electronic Components
Identify and name different types of electronic components.
Draw their Graphic symbols
Current, Voltage and Resistance
Define current, voltage, resistance, and state their units and symbols.
Define attraction and repulsion of charges.
State laws of attraction and repulsion.
Conductors, Insulators and Semi-Conductors
List different type of conductors, Insulators and semi- conductors
Identify conductors, Insulators and semi- conductors.
Structure of Matter
Define Matter, Molecule, Atom, Nucleus and Electron.
Draw an atom showing its parts
Sources and Preventions of Hazards
State the sources of hazards.
List workshop safety rules and regulations.
Observe safety rules and regulation.
List types of workshop fire fighting materials.