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13.8.3 Overhead Versus Underground Distribution Systems
13.8.4 Connection Schemes of Distribution System
13.9 Domestic Wiring
13.9.1 Service Connection
13.9.2 Service Mains
13.9.3 Distribution Board for Single-phase Installation
13.9.4 Neutral and Earth Wire
13.9.5 Earthing
13.9.6 System of Wiring
13.9.7 System of Connection of Lights, Fans and Other Electrical Loads
13.10 Circuit Protective Devices and Safety Precautions
13.10.1 Safety Precautions in Using Electricity
13.11 Efficient Use of Electricity
13.12 Review Questions
14. Semiconductor Devices
14.1 Introduction
14.2 Review of Atomic Theory
14.3 Binding Forces Between Atoms in Semiconductor Materials
14.4 Extrinsic Semiconductors
14.4.1 n-Type Semiconductor Material
14.4.2 P-Type Semiconductor Material
14.4.3 The p–n Junction
14.4.4 Biasing of p–n Junction
14.5 Semiconductor Diodes
14.5.1 Volt-ampere Characteristic of a Diode
