BE8255 – NOTES & QP
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BE8255 – SYLLABUS
UNIT I ELECTRICAL CIRCUITS ANALYSIS
Ohms Law, Kirchhoff?s Law-Instantaneous power- series and parallel circuit analysis with resistive, capacitive and inductive network — nodal analysis, mesh analysis- network theorems — Thevenins theorem, Norton theorem, maximum power transfer theorem and superposition theorem, three phase supply-Instantaneous, Reactive and apparent power-star delta conversion.
UNIT II ELECTRICAL MACHINES
DC and AC ROTATING MACHINES:Types, Construction, principle, Emf and torque equation, application Speed Control- Basics of Stepper Motor — Brushless DC motors- Transformers-Introduction- types and construction, working principle of Ideal transformer-Emf equation- All day efficiency calculation.
UNIT III UTILIZATION OF ELECTRICAL POWER
Renewable energy sources-wind and solar panels. Illumination by lamps- Sodium Vapour, Mercury vapour, Fluorescent tube. Domestic refrigerator and air conditioner-Electric circuit, construction and working principle. Batteries-NiCd, Pb Acid and Li ion–Charge and Discharge Characteristics. Protection-need for earthing, fuses and circuit breakers.Energy Tariff calculation for domestic loads.
UNIT IV ELECTRONIC CIRCUITS
PN Junction-VI Characteristics of Diode, zener diode, Transistors configurations — amplifiers. Op amps- Amplifiers, oscillator,rectifiers, differentiator, integrator, ADC, DAC. Multi vibrator using 555 Timer IC . Voltage regulator IC using LM 723,LM 317.
UNIT V ELECTRICAL MEASUREMENT
Characteristic of measurement-errors in measurement, torque in indicating instruments- moving coil and moving iron meters, Energy meter and watt meter. Transducers- classification-thermo electric, RTD, Strain gauge, LVDT, LDR and piezoelectric. Oscilloscope-CRO.