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Electricity and Electronics - 12  (
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1. Distribution of electric Power. Idea of a simple distribution system. Mention the local system Shoud be made
2. The D.C. generator and Motor. Use of Spli ring Commutators; constructional features. Shunt Series and compound field connections and their characteristics. Starting of D.C Motors. Ideas of back e.m.f
3. The A.C. Motor. Ideas on A.C.Motors (Single Phase only). the Rotating field. Methods of Shunting:Capacitance start, split start. Single Phase induction motor Types.
4. Wires, Cables and electrical wiring . Construction of various types in domestic and Industrial use . (Solid and Stranded cables)- How insulated and Protected Flexes). Selection of Cable Sizes, Voltage drop aqnd simple calculation on current carrying ca
5. Electrical Accessories. Structure and Uses of various Types of Switches, power , outlets, lamp holders, ceiling roses and junction boxes. { Familarity with these is expected (but no questions will be set needing detailed knowledge of structure). Where
6. Introduction to electronics. Concept of electron flow. Common components employed in electronic circuits; resistors, capacitors and inductors, their structure and uses
7. Diodes. Thermionic Diode; semiconductor diode. Structure of Vacuum diode and semiconductor diode
8. Power supply for electronic apparatus. mains Transformer. the Diode; Half wave, full wave and bridge rectifiers, voltage doubler. Filters; RC filters, chokes, bleeder resistance and its functions
9. Vaccum Triode. Structure of the Vacuum Triode valve. The control grid. Triode valve characteristics. Triode Parameters; anode resistance, mutual conductance and amplification factors; relationship between the above parameters. Triode as a voltage ampli
10. Transistor. the Junction Transistor: PNP and NPN types. Introduction to various methods of construction; their characteristics including handling procedures and precautions
11. Transistor amplifier. Introduction to the common base, common emitter and common collector amplifiers. comparison of the voltage, current and power gains and input and output resistances (elementary approach only). Phase relationship. Bias Stabilizati
12. The amplifier. A Typical Amplifier voltage and power amplification . Matching of the power output stage to a speaker
13. Apparatus for reproducing and recording sounds. range of Hearing, recording and reproducing. Characteristics of microphones; carbon, crystal, moving coil and ribbon types. The common types of gramophone pick-ups. The earphone, crystal and magnetic tap
14. Common Types of electronic measuring instruments. Valve Voltmeters, transistorised voltmeter, signal generator, Oscilloscope, use and care of the above instruments