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N.Mathavan AP /

Nadar Saraswathi College of Engineering &

Nadar Saraswathi College of Engineering & TechnologyGE 6252 – Basic Electrical & Electronics Engineering

C o m p r e s s e d M a t e r i al

UNIT – I ELECTRICAL CIRCUITS & MEASURENENT1. Explain about Moving Iron Instrument (16,8,8,10,8,16) – 6 Times

Attraction Type ------(Diagram)- Gravity Control- Air friction Damping

Repulsion Type- Radial Vane Type ------(Diagram)- Co-axial Vane Type ---(Diagram)

Torque Equation Errors in MI instrumentsheading) Advantages (3 points) Disadvantages (3 points) Application (3 points)

2. Explain about Moving Coil Instrument (8,16) – 2 Times

Operating Principal Construction ------- (2 Diagram)

- Moving Coil- Iron Core- Pointer & Scale- Controlling Torque (Diagram)

- Spring Control- Damping Torque (Diagram)

-Eddy Current

Torque Equation Errors (3 points) Advantages (3 points) Disadvantages (3 points) Application (3 points)

3. Electrodynamometer Wattmeter(10,8,8,8) – 4 Times

4. Induction Type Energy meter(8,8) – 2 Times

Operating Principal Construction – (Diagram)

- Fixed or Field Coil- Moving Coil- Pointer & Scale- Spring Control – (Diagram)- Air friction Damping – (Diagram)

Errors

Basic Principal Construction

- Driving S ystem- Moving S ystem- Braking S ystem- Registering S ystem

Operating Mechanism

- Current Coil- Pressure Coil

Advantage

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N.Mathavan AP /

Nadar Saraswathi College of Engineering &

UNIT – II – ELECTRICAL MACHINE1. DC Generator (16,8.8.,8,16,4) –6 Times

Introduction ------(Diagram) Construction Details

- Magnetic Frame or Yoke --(Diagram)- Poles,Interpoles,PoleShoe,Winding

(Diagram)- Armature- Commutator (Diagram – 4.9

EMF Induced Types of DC Generator

- Separately Excited --(Diagram)- Self Excited

Series Generator --(Diagram) Shunt Generator --(Diagram) Compound

Generator -- 2. DC Motor (16,8,8,8,8,8,8,12,12) – 9 Times

Introduction ------(Diagram) Principle of Operation (3 Diagram) Back EMF ------(Diagram) Voltage Equation ------(Diagram) Power Relationship Disadvantages

Types of DC Motor- Separately Excited --(Diagram)- Self Excited

Series Generator --(Diagram) Shunt Generator --(Diagram) Compound

Generator -- 3. Transformer (16,16,16,16,8,8,8,8,8,8) – 10 Times

Introduction ------(Diagram) Working Principle (2 Diagram) Classification of Transformer Cooling Arrangement------(only heading) EMF Equation ------(Diagram)

Construction Details ------(Diagram 4.35)

- Magnetic Core Core type ------(Diagram) Shell Type ------(Diagram)

- Winding Primary Winding Secondary Winding

- Insulation & InsulatioOil- Expansion Tank- Temperature Gauge

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N.Mathavan AP /

Nadar Saraswathi College of Engineering &

UNIT – III – SEMICONDUCTOR DEVICES & APPLICATION1. PN Junction Diode (16,8,16,8,8,4) – 6 Times

Theory of PN Junction ----(Diagram)

- P type ----(Diagram)- N type ----(Diagram)

Junction or Barrier Voltage ----(Diagram) Operation of PN Junction

- Forward Bias ----(Diagram)- Reverse Bias ----(Diagram)

VI Characteristics of PN Junction

- Forward Bias ----(Diagr- Reverse Bias

Application Breakdown Mechanism

- Zener- Avalanche

2. Bipolar Junction Transistor (BJT) (6,16,16,16,16,16,16,16,16,8,16,10) – 12 Times

Introduction ------(Diagram) Emitter, Base, Collector Working Principle

- PNP Transistor ------(Diagram)- NPN Transistor ------(Diagram)

Transistor Configuration ------(Diagram)

- Common Base Input Character --(Diagram)

- Common E mitter Input Character --(Diagram) Output Character --(Diagram) Characteristics of CE

- Common Collector Input Character --(Diagram) Output Character --(Diagram) Characteristics of CC

3. Rectifiers (16,16,8,8,8,8) – 6 Times

Introduction ------(Diagram) Classification of Rectifiers

- Controlled- Un Controlled

Half Wave Rectifier Centre taped full wave rectifier Full Wave Bridge Rectifier

HALF/FULL/BRIDGE REACTIFIER Construction Details ------- (Diagram) Operation----- (Waveform) Equations------ (10 equation –5.8.4) Advantages Disadvantages

4. Zener Diode (16,16,8,8,8,8) – 6 Times

Introduction Zener Effect Zener Breakdown

Equivalent Circuit ------- (3 Diagram) VI Characteristics ------- (Diagram) Application

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N.Mathavan AP /

Nadar Saraswathi College of Engineering &