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Learn the properties and applications of hard magnetic materials such as tungsten steel, chromium steel, cobalt steel, Alnico and hard ferri…
Ch. Devi Lal Government Polytechnic, Nathusari Chopta › Diploma in Engineering (Polytechnic) › Electrical Engineering › Semester 3
Read online · 1 PDF · Updated 12 Nov 2026
Open notesLearn which engineering materials are used for the frame, core, windings, rotor bars, shaft, bearings, brushes, commutator and slip rings of…
Ch. Devi Lal Government Polytechnic, Nathusari Chopta › Diploma in Engineering (Polytechnic) › Electrical Engineering › Semester 3
Read online · 1 PDF · Updated 12 Nov 2026
Open notesLearn which engineering materials are used for the core, windings, insulation, oil, tank, bushings and other parts of a transformer, and the…
Ch. Devi Lal Government Polytechnic, Nathusari Chopta › Diploma in Engineering (Polytechnic) › Electrical Engineering › Semester 3
Read online · 1 PDF · Updated 12 Nov 2026
Open notesLearn the soldering process and the properties of solder, how a bimetallic strip works and where it is used, and what a fuse is, with its ma…
Ch. Devi Lal Government Polytechnic, Nathusari Chopta › Diploma in Engineering (Polytechnic) › Electrical Engineering › Semester 3
Read online · 1 PDF · Updated 12 Nov 2026
Open notesLearn what a thermocouple is, how the Seebeck effect produces an EMF, how a thermocouple works with a diagram, which metals are used, and wh…
Ch. Devi Lal Government Polytechnic, Nathusari Chopta › Diploma in Engineering (Polytechnic) › Electrical Engineering › Semester 3
Read online · 1 PDF · Updated 12 Nov 2026
Open notesLearn the properties and applications of high resistivity conducting materials such as constantan, nichrome, manganin, tungsten, carbon, pla…
Ch. Devi Lal Government Polytechnic, Nathusari Chopta › Diploma in Engineering (Polytechnic) › Electrical Engineering › Semester 3
Read online · 1 PDF · Updated 11 Nov 2026
Open notesUnderstand the construction and internal arrangement of an SCR (thyristor): its four P-N-P-N layers, three junctions, terminals, symbol and…
Ch. Devi Lal Government Polytechnic, Nathusari Chopta › Diploma in Engineering (Polytechnic) › Electrical Engineering › Semester 5
Read online · Updated 03 Nov 2026
Open notesLearn the properties and applications of soft magnetic materials such as iron-silicon alloy, C.R.G.O. (grain orientation), nickel-iron alloy…
Ch. Devi Lal Government Polytechnic, Nathusari Chopta › Diploma in Engineering (Polytechnic) › Electrical Engineering › Semester 3
Read online · 1 PDF · Updated 02 Nov 2026
Open notesLearn the desirable properties of good magnetic materials, hysteresis loss and its Steinmetz formula, eddy current loss, how lamination redu…
Ch. Devi Lal Government Polytechnic, Nathusari Chopta › Diploma in Engineering (Polytechnic) › Electrical Engineering › Semester 3
Read online · Updated 02 Nov 2026
Open notesLearn the properties and applications of mica, asbestos, porcelain, steatite, glass, cotton, silk, jute, paper, rubber, bitumen, silicone gr…
Ch. Devi Lal Government Polytechnic, Nathusari Chopta › Diploma in Engineering (Polytechnic) › Electrical Engineering › Semester 3
Read online · Updated 02 Nov 2026
Open notesLearn the difference between thermoplastic and thermosetting materials, and the properties and applications of PVC, polyethylene, polystyren…
Ch. Devi Lal Government Polytechnic, Nathusari Chopta › Diploma in Engineering (Polytechnic) › Electrical Engineering › Semester 3
Read online · Updated 02 Nov 2026
Open notesLearn the properties and applications of gaseous insulators (air, nitrogen, SF6) and liquid insulators (mineral oil, Pyranol) used in transf…
Ch. Devi Lal Government Polytechnic, Nathusari Chopta › Diploma in Engineering (Polytechnic) › Electrical Engineering › Semester 3
Read online · Updated 02 Nov 2026
Open notes
