Sr. No.001102 December 2023 B.Tech (AE/FAE) -1 SEMESTER Basic Electrical Engineering (EE-101C) Time: 3 Hours Max. Marksi75 Instructions: 1, Ieiscompulsory to answer al the questions (1.5 marks each) of Part A in short 2. Answer any four questions from Part-B in detail 3. Diferent sub-parts ofa question are to be attempted adjacent to each other. 4. b. Any other specific instructions PART-A QI (@) Define dependent voltage source and draw the voltage dependent voltage (1.5) source, (b) Discuss the Lenz's law. (15) (©) Define coefficient of coupling in a magnetic circuit. (15) (@) State the application of superposition theorem, (15) (e) Describe the Millman‘s theorems. (1.5) (0) Define the term bandwidth and selectivity. (15) (2) Differentiate between balanced and unbalanced load (1s) (h) Write the application of DC motor. (15) (@ Define the efficiency. (15) () Write the relation between line current and phase current in delta connected (1.5) load, PART-B Q2 (a) State the faraday law of electromagnetic induction and explain the statically (7.5) and dynamically induced emf with suitable example. (b) State and explain the Maximum power transfer theorem, (75) Q3 (a) Explain the Kirchoff s voltage and current law with some suitable example, (75) (b) State and explain the reciprocity theorem with suitable example. (75) Q4 (a) A resistance R is connected in series with a parallel circuit comprising two (75) resistances of 12 © and 802 respectively. The total power dissipated in the circuit is 70 W when the applied voltage is 20V. Caleuiate R. (b) Find the current following through 1/0 resistance using Thevenins theorem in (7.5) figure(1) PTO. & scanned with OKEN ScannerFigure (1) QS (@) What is series resonance? Derive the expression for resonant frequency in R-L- (7.5) Cseries circuit. (b) Explain working of auto transformer. What are the advantages of auto (7.5) transformer over two winding transformers? . Q6 (a) A 3-phase, 400 V, 50 Hz a.c. supply is feeding a 3-phase delta-connected load with (7.5) each phase having a resistance of 25 0, an inductance of 0.15 H and a capacitor of 120 pF in series. Find line current, volt-amp, active power and reactive volt-amp. (b) Explain the principle of operation and constructional features of synchronous (75) generator. Q? (a) A resistance of 20° and a coil of inductance 31-8 mH and negligible resistance are (7.5) connected in parallel across 230 V, 50 Hz supply. Find (i) the line current (fi) power factor and power consumed by the circuit (®) Write the name of starting method of Induction motor and explain any one (7.5) with suitable circuit diagram eeeerereneesy & scanned with OKEN ScannerRoll No. .. , Total Pages : 4 013102 December 2023 B.Tech. ist SEMESTER Basic Electrical Technology (ESC-101-A) Time : 3 Hours) [Max. Marks : 75 Instructions : 1. It is compulsory to answer all the questions (1.5 marks each) of Part-A in short. 2. Answer any four questions from Part-B in detail. 3. Different sub-parts of a question are to be attempted adjacent to each other. 4. Assume data if missing. PART-A 1. (a) Differentiate independent and dependent sources. COl (1.5) (b) What are the limitations of Ohm's law? CO1 (1.5) (c) Define unilateral and bilateral circuits. COl (1.5) (d) Define resonance in series RLC circuit. CO2 (1.5) (e) Add V, = (-10 + j 50) volts to V, = (30 + j 20) volts and express the result in polar form. CO2 (1.5) (f) What are the advantages of a three-phase AC system over single-phase? CO2 (1.5) (g) What are the applications of auto-transformers? CO2 (1.5) 013102/1,560/111/333 qk? [P.T.0. @ scanned with OKEN Scanner(nh) Why brushes are made of carbon in a DC mechine? 3. (a) Find the average end effective values of the sinusoidal (€03 (1.5) waveform shown in Figure. The meximum value is (i) What is the function of a fuse in electrical installation? 100 V. 02 7.5) C04 (1.5) () Why earthing is necessary for electrical installations? C03 (1.5) PART-B 2. (a) Using node analysis determine the current in cach resistor for the given circuit. C1 (7.5) (b) A 230V, 50 Hz ac. supply is applied to a coil of 0.06 H inductance and 6-ohm resistance connected in series with a 6.8 [iF capacitor. Calculate (i) impedance (ii) ‘current (iii) phase angle between current and voltage (iv) power factor and (v) power consumed. C02 (7.5) 4. (@) Derive the relationship between line and phese voltage and line and phase current for a star-connected three- : . | phase system with suitable connection and phasor (b) In the circuit shown in the figure, find the curreal in diagrams. C02 (7.5) 2Q resistor using the principle of superposition col (7.5) (b) The power input to a 400 V, 3-phase, SO Hz induction motor is measured by the two-wattmeter method. The readings of the two wattmeters are 40 kW and -10 KW. Calculate (i) the input power (ii) the power factor and (ii) line current. C02 (7.5) 5. (a) Define the term magnetic circuit. What are the similarities and dissimilarities between magnetic and electric circuits? C03 (7.5) 013102/1,560/111/333, ai 013102/1,560/1 11/333 3 P70. @ scanned with OKEN Scanner(b) Explain the working principle of a transformer. What are the properties of an ideal transformer? Draw and explain the phasor diagram of the single-phase transformer at no load condition. CO3 (7.5) 6. (a) Why is a synchronous motor not self-starting? What are the starting methods of synchronous motor? CO3 (7.5) (b) Explain the construction and working of the miniature circuit breaker (MCB) with suitable diagram. C04 (7.5) 7. (a) Define the term power factor. What are the effects of the low power factor? What are the methods of power factor improvement? C04 (7.5) (b) Define the maximum power transfer theorem. Derive the condition for maximum power transfer. COl (7.5) 013102/1,560/111/333 4 & scanned with OKEN ScannerRoll No. ..... Total Pages : 03 007201 May 2024 B.Tech. (EL/ECE/ENC/EEIOT) (Second Semester) Basic Electrical Technology (ESC-101-A) Time : 3 Hours [Maximum Marks : 75 Note : It is compulsory to answer all the questions (1.5 marks each) of Part A in short. Answer any four questions from Part B in detail. Different sub-parts of a question are to be attempted adjacent to each other. Part A 1. (a) Define Superposition Theorem. 15 (b). Write the formula for star to delta and delta to star conversion. 15 (c) Differentiate between instantaneous and RMS value of any signal. 15 (d) Why efficiency of transformer is high than machine ? 15 (e) Write the formula for Synchronous speed. 15 @) Why rotor speed is less that synchronous speed ? 1.5 o-nnsas19C-007201 PLO. & scanned with OKEN ScannerWrite few examples of reactive loads, 15 i (g) (bh) Define Switchgear. 15 (i) How many winding are there in single-phase auto transformer ? Ls (j)_ Write few examples of capacitive loads, 1,5 Part B (a) State the maximum power transfer theorem and explain its importance. 5 (b) For the network shown below find the current in 24 kQ resistance : 10 6.6 kQ : 24k2 f Gm) 9.4kQ 2.4kO 120V What do you mean by Power factor of a network ? Explain it in different terms. 5 series circuit is (a) (b) The two element connected across an A.C. source of y = 200V2sin (314¢ +. 20°) volt and the current flows through the circuit. is i = 10V2 cos (314¢ — 20°). Determine the 10 parameters of the circuit. C-007201 2 & scanned with OKEN Scanner——f Why is Farthing required ? What are various JUS | & iype of carthings used for carthing of puildings 2 Explain any one. 10 ) Describe the following in brief : Fuses, MCB, ELCB, MCCB. 5 . @ Define Transformer. Describe the applications of transformers. 5 wo) A single-phase 50 Hz transformer has rating of 80 kVA and voltage ratio of 3200/400 volt. It is known that there are 11 turns on the secondary winding. Calculate number of full load primary current and e of mutual flux in the core. 10 primary turns, maximum valu 6. (a) Describe the method of measurement of S-phase power by 2 wattmeter method. 10 (b) A balanced star connected load of (8 + &) ohm per phase is connected to a 3-phase, 230 V, 50 Hz supply. Find the current and Power factor, 7 1. (a) Deseribs e the constructi ki DC machine, en aad ros in (b) Describe the : © magnetic i inci synchronous Rak aaa oanes34)C-007201 5, : ; 1350 ie | @ scanned with OKEN ScannerSessions itech 11 SEMESTER pos asic Electra! Tecnology (BCS, E10) atzC) [a : eee Max. Ma a cpt en 2 Seba (Pt arempted ajacen to cech Oe tie iit, Qt (@) Whatdoyou undead by Half paver Bandwidth fora series Reson core ofthe transformer sated? @ Gree avaings fa Tre plow iomover ingle phase ACeaui , @) Fat isthe pletion of pie Cer ® ts ine wansformer is called a static device? — Q ee . "2 @) Bessie he pine of operation of a single phase transformer sing saimabie -~) ee ina, (b) Drv piasor diagram ofa single phase wansformer on Toad condition for) ‘ndtv load 0 ( ese te conto of Panel sms ing spo cizeit diagram and (5) SR ce engin of esis of 110 hms and a capacitance 750 (5) isconeaed stout 220° 0 mang, clelate()Inpedancs, Pas? pve tar een he. i Wolpe ames reste S 40 Coit Yee "yy Th land conneciea to 3 pha in sar, The Tine euvent restectvely. Find the ine an aa at ‘The KVA and KW "i voltage and VAR inputs ew ae j ' nivorsty of eionce and Technology Department of Mathematies Second Sessional Test ~ September 2022 Subjects Mathematies I (BSC1O3E) Semester: 1" © Courses B. Tech (Civil) : Maximum mari ‘Time allotted: 90 minutes ‘Attempt all questions: Bach question earry equal marks. 1. Solve y""-5 y'+6y=e%* @ scanned with OKEN ScannerJ.C. Bose University of Sel Sessional-1" (3 BASIC ELECTRICAL TECHNOLOGY (PSC 101A) M. Marks: 15 — P ta) Distinguish between bilateral and unilateral networks. (1) i) State applications of maximum poster transfer theorem? (1) ¢) Whatare the limitations of ohm’s aw? (1) Define dependent and independent sources. (1) ¢)_ State superposition theorem. (1) Pairt-B each branch using nodal analysis. (5) svenin’s theorem with suitable example.(3) 1d Norton equivalents of the given circuit at 3). State and explain The Q4) Find the Thevenin ant terminal ‘ab’. (5) terminal ‘ab’. (5) ea 4. A7ommlangne Faas an end Pat 20mm tev the Inne ee tote Wr. recon os I iscepee oh. bows ojos. 4. Dusen antowan pesto the Rue re bow n at andl relatos. “4 rte hare eto he Eee een Bl ws @ scanned with OKEN Scanner3 e ember 2022 i oe ‘i ee ISEMESTER t KA past Hectreal Technology (ESC-101-A) ines ; : Insta yatampioy bower ate quis (15a oth) offre Ao, {sumer oy urges Pr Bin decal + ape que quesin crn be onemped eden tach {eter erations SMa Marks:75 PARA o5y(cot) 1) Emmet eaoustintatons ohms : oe stage (15)(603] (©) Convers source with its parallel resistance of 157 into Its equivler! i bre i cil hcp, asycon {@) Define dynamic impedance. Also write its unit, (.5)(co2} fe tap POTS ne cd og tusyeo2) paseo pies {E) nese ponernrastement by rower todo ae ancl, (1.5}{602) oder wha condos eon atnter wil geo al we 0 foo wibemeentey he te tod of sting snge-Phase Ina {Shae st onevom of commutator inge machines? D)_ Wey earthing provides? (si(coa} césy(com) awe (e1c01) 17/31 sate rons theorem Find the curr! hough 10M by wg Nr 0) verse shown in Fig by wing Noro we os 0) Show that yall Bg Seman chow (sile02) That thes Purely inductive cnet eusreat Ks the vor io} Draw essere Power consid anor a (5){co2} . nce curve, Also define selectivity and Qual #1 QF (8) Discuss two-wattmeter method f vement in ewerase system ()[CO2] feeding tanned ond Done tht gapessan rane power eee and PONE factor. (b) A balanced three-phase star load impedance of (50) ) nns ger phase and is (7)(C02] supplied from balanced three-phase 40, Sosa sunp Cake inte the values for eeecanee fv) total @ scanned with OKEN ScannerJ.C. Bose University of Science ana technology, YMCA, Faridabad B. Tech 2" semester Civil Engineering Sessional 2" (Basic Electrical Technology) Note: - attempt any three. . Ql. A three phase star connected load consists of three identical inductive coils of resistance _ line current, (iii) power factor, and (iv) Total power consumed. (5) Q2. Draw and explain the two wattmeter method of power measurement in a three phase circuit, 6) Q3. Explain working of auto transformer. What are the advantages of auto transformer over two winding transformer? (5) Q4. A coil in parallel with a 200pF is connected across a 200V. ply. The coil tak 8A ‘a loss in the coil is 960W.Calculate the following- (i) The resistance of the coil, (ii) The 7 tance of the coil, and (iii) Power Factor of the entire circuit. (5) SS —— —— Re Wo & scanned with OKEN Scanner-“I-G, Bose University of Sesslonal-14 eyes BASIC ELECTRICAT- ‘ime: 1:30 hrs * ind Phase difference inltemating guantity. b) Define Power" and Power factor? 9 iyo ition ate power regarding Maximum powet transfer theoréiit? the difference benween ‘active and passive elements & jdeal current voltage sourc 4) Define current divisioy rl Je and voltage division rule with examples. Part-B. luc (J,,) and Average value (1 id Norton models from Fig. ~ %, -Q.2) Dative RMS vs for Fulland Half Simuseidalowave ‘and henée find current flowing through 10 i Fig. 1 ¥ a) Jue © 4). From Fig, 2 ind (1) Ry sul that maximum power Y i be transfered OR °) a this maximum power, (3) Power supplied by source under this condition am @) , maximum efficiency. s z tov i ew ene al @ scanned with OKEN Scanner