00000EE100121804 Pages: 2

Reg No.: Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
B.Tech 51,52 (5) Examination September 2020 (2015 Scheme)

Course Code: EE100
Course Name: BASICS OF ELECTRICAL ENGINEERING

Max. Marks: 100 Duration: 3 Hours
PARTA
Answer all questions, each carries 4 marks. Marks
1 Draw and explain the ۷-۱ characteristics of ideal and actual current sources. (4)
2 Differentiate between statically induced emf and dynamically induced emf. (4)
3 What are the advantages of three phase system over single phase system? (4)
4 Define Active power, Reactive power and Apparent Power? Also draw the (4)
power triangle.
5 List the advantages and disadvantages of the thermal power plant. (4)
6 Describe the working of solar photovoltaic energy conversion system. (4)
7 Derive the emf equation of single phase transformer. (4)
8 Explain the working principle of DC generator. (4)
9 How do you make Single-Phase Induction Motor Self-Starting? (4)
10 Compare squirrel cage induction motor with slip ring induction motor. (4)
PART 13

MODULE (1-4)
Answer any four questions, each carries 10 marks.
11 Find current I, in figure by using Y - A transformation. (10)

2 0
കി கு

= നാ
[

2௭௱ 2 ‏حصطه‎ 2 ohm = 2ohm

|| ‡~~ 1 ohm

2०५

12 An iron ring is made up of two different materials A and B and also has anair (10)
gap of 2mm. The relative permeability of A is 1000 and B is 1500 while their
lengths are 75cm and 25 cm respectively. The cross sectional area of the core is
10cm’. The magnetizing coil has 1000 turns and a current of 10۸ is allowed to
flow through it. Calculate the i) the reluctance of part A, B and air gap ii) the

flux in the air gap iii) mmf corresponding to each of the 3 parts.

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