Download DBATU B-Tech 1st Year 2017 May Basic Electrical Engineering 1 Question Paper

Download DBATU (Dr. Babasaheb Ambedkar Technological University) B.Tech First Year 2017 May Basic Electrical Engineering 1 Question Paper

Dr. Babasaheb Ambedkar Technological University, Lonere
' " Examination ' ' (SJ
B.Tech. Course in Civil / Chemical / Mechanical / Petro-chemical Engineering
- Subject-Basic Electi'ical Engineering
Date-
Time- 2.-oo 0? MAY 2017 EE l?O? Miimxvitrelgso
-S=oo Pm
Instruction to Students:-
1. Atte mpt any FIVE questions from Question 1 to Question 6.
2. lllusIrate your answers with neat sketches, diagrams etc wherever necessary.
3. If some part or parameter is noticed to be missing, you may appropriately assume it and
should hention it clearly.
Q.l)a) State and Explain Ohm's law. - 4M
b) Explain circuit for resistances connected in series with necessary voltage and 4M
current relations.
c) Calculate equivalent resistances between terminal A and B 4M
A 40 30 . B
?M ?Nv
3??
--?-wv-??-
?9?
V
OR
c) Calculate equivalent resistances between terminal A and B given below 4M
50
Wv
3?0 4f
2?}
?ww...
m :m
A ? B
Q.2)a) State and Explain the following:- - 6M
i) Source Transformation technique ( ii) Thevenin's theorem
____J

b) F ind current through 6 Q resistor using Mesh analysis
iv BO
. l- A
v _ M
. n n n , ?lr ?W
11) 1'
6M
20 g 3?? ? 10
25V
OR
b) Determine the current through 5 Q using Superposition theorem 6M
101: 2:1?
?Wv ? ?VW
? rm
_2v 4v
Q.3)a) De?ne the following terms:? 7 ' 6M
i) Cycle ii) Time period iii) Instantaneous value iv) Peak value
v) Average value vi) RMS value
b) Explain AC circuit with pure resistance and derive equations for average and 6M
Instantaneous power.
Q.4)a) State and explain Active powen Reactive power and Apparent power with help of 6M
Power triangle.
OR
Q.4)a) Explain series R?L circuit with neat labelled diagram and waveforms and draw 6M
impedance triangie for the same circuit.
b) A voltage of 150 V, 50 Hz, is applied to coil of negligible resistance and 6M
inductance of 0.2 H. Write the time equation ?of voltage and current.
Q.5)a) Explain magnetic effect of electric ,current. Also explain dot and cross convention. 6M
b) Explain the terms i) Statically induced emf ii) Dynamically induced emf. 6M
Q.6)a) Derive the emf equation of' single phase tranfonner and explain voltage and 6M
current ratio of an ideal transfonncr.
OR
a) Explain the following types of transformer in detail:- 6M
i) Core type transformer ii) Shell type transformer.
b) A 10 KVA transformer having 50 number of turns on primary and 10 number of
tums of secondary is connected to 440 V, 50 Hz, AC supply. Calculate:-
a) Secondary voltage on No load.
b) Full load primary and secondary carrent.
0) Maximum value of the ?ux in core.