Paper One – Electrical Theory PAPER 1 Electrical Theory UNIT 12. AC Circuits and Power Systems AC Circuits and Power Systems o Vectors, Phase, and Phase Difference o Resistance, Inductance, and Frequency in AC Circuits o Power and Power Factor o Single-Phase and Three-Phase Systems o Star (Wye) and Delta (Triangle) Connections o Phase Sequence…...
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Paper One – Electrical Theory PAPER 1 Electrical Theory 11. Direct Current (DC) Motors Direct Current (DC) Motors o Series, Shunt, and Compound Wound Motors o Installation, Starting, Speed Control, and Reversal  DC Motors: Comprehensive Guide (Series, Shunt, Compound Motors – Working, Types, Tests, Pros & Cons, MCQs) 1. Principle/Working Mechanism Simple Explanation A DC…...
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Paper One – Electrical Theory PAPER 1 Electrical Theory UNIT 10. Alternating Current (AC) Motors Section 4: Electric Motors and AC Circuits 10. Alternating Current (AC) Motors o Induction Theory: Cage and Slip-Ring Types o Synchronous and Commutator Motors o Installation, Starting, Speed Control, and Reversal  Here’s a concise yet comprehensive breakdown of Section 4:…...
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Paper One – Electrical Theory PAPER 1 Electrical Theory UNIT 9. Batteries and Charging Circuits Batteries and Charging Circuits o Primary Cells (Dry Cells) vs. Secondary Cells (Lead-Acid, Nickel-Iron) o Initial and Subsequent Charging of Batteries o Series and Parallel Battery Circuits o Maintenance and Use of Hydrometers  Batteries and Charging Circuits Primary Cells…...
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Paper One – Electrical Theory PAPER 1 Electrical Theory UNIT 8. Direct Current (DC) Generators Direct Current (DC) Generators o Construction and Working Principles o Shunt, Series, and Compound Dynamos o Causes of Sparking and Commutator Maintenance o Carbon Brushes: Adjustment and Care o Voltage Regulation and Parallel Operation  DC Generators: Comprehensive Guide Construction…...
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Paper One – Electrical Theory PAPER 1 Electrical Theory UNIT 7. Alternating Current (AC) Generators (Alternators) Alternating Current (AC) Generators (Alternators) o Construction and Essential Components o Voltage and Frequency Control Methods o Synchronization Conditions and Methods o Switchboards and Accessories Here’s a structured breakdown of AC Generators (Alternators) with all requested elements: Construction & Essential Components…...
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Paper One – Electrical Theory PAPER 1 Electrical Theory UNIT 6. Sources and Methods of Electricity Generation Section 3: Generation of Electricity 6. Sources and Methods of Electricity Generation o Natural Sources of Energy o Types of Prime Movers o Generation of EMF: DC and AC Systems Sources and Methods of Electricity Generation Natural Sources…...
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Paper One – Electrical Theory PAPER 1 Electrical Theory 5. Wires, Cables, and Protective Devices Wires, Cables, and Protective Devices o Different Types of Wires and Cables Wires and Cables: Types and Applications Principle/Working Mechanism Definition: Wires:Â Single or stranded conductors (usually copper/aluminum) for electrical connections. Cables:Â Multiple insulated wires bundled together for power/data transmission. Key Terms:…...
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Paper One – Electrical Theory PAPER 1 Electrical Theory UNIT 4 Electrical Materials and Components Section 2: Electrical Materials and Components 4. Conductors, Insulators, and Insulating Materials Conductors, Insulators, and Insulating Materials Principle/Working Mechanism Definitions: Term Definition Symbol Unit Conductor Material allowing free electron flow (low resistance) σ (Conductivity) Siemens/m (S/m) Insulator Material resisting electron…...
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Paper One – Electrical Theory PAPER 1 Electrical Theory UNIT 3 Production of Electromotive Force (EMF) Electromagnetism o Production of Electromotive Force (EMF)  Here’s a comprehensive yet concise breakdown of Electromotive Force (EMF) Production with all requested elements: Production of Electromotive Force (EMF) Principle/Working Mechanism Definition:EMF is the voltage generated by any source (battery, generator) that…...
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