ET (B-TECH Mechanical Engineering 1st-2nd)

Section A

D.C. Network Laws And Theorems:

a) Ohm’s Law, Kirchoff’s Laws, Nodal and Loop methods of analysis, Star toDelta & Delta to Star transformation.

b) Thevenin’s theorem, Norton’s theorem, superposition theorem, maximum power transfer theorem, Milman’s theorem

Section B

Single Phase A.C. Circuits:

a) Sinusoidal signal, instantaneous and peak values, RMS and average values, crest and peak factor, Concept of phase,

phasor representation-polar & rectangular, exponential and trigonometric forms, behaviors of R,L and C components in

A.C. circuits.

b) Series and Parallel A.C. circuits, Concept of active and reactive power, power factor. Series and Parallel resonance, Q

factor, cut-off frequencies and bandwidth.

Section C:-

Three Phase A.C. Circuits:

 Phase and line voltages and currents, balanced star and delta circuits, power equation, measurement of power by two wattmeter

method, introduction to unbalanced circuits.

Transformers:

Construction, EMF equation, Ideal transformer, Phasor diagram on no load and full load, equivalent circuit, losses, regulation and

efficiency, open and short circuit test.

Application of DC machines, Moving Coil Type.

Section D

Electrical Machines:

Construction , Principle, working, E.M.F. equation and losses of D.C. machine, comparison of construction and working of D.C.

machine with Induction motor and synchronous machine.

Measuring Instruments:

Construction, operation and uses of moving iron type and moving coil type, induction type Voltmeter, Ammeter, Watt meter,

Energy meter.