Reg No.:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIRST SEMESTER B.TECH DEGREE EXAMINATION, DECEMBER 2019

Course Code: EST 130

Course Name: BASICS OF ELECTRICAL AND ELECTRONICS ENGINEERING

Max. Marks:50

PART 1: BASIC ELECTRICAL ENGINEERING
(2019-Scheme)

PART A

Answer all questions, each carries 4 marks.
Define the terms i) mmf ii) magnetic field strength iii) magnetic flux and
iv) magnetic flux density.
State and explain i) Faraday’s laws and ii) Lenz’s law.
State and explain Kirchhoff’s laws with examples
Explain the advantage of three phase system of power supply compared
to single phase system of power supply.
When an alternating voltage of (80+j60) V is applied to a circuit, the

resulting current flow is (-4+j10)A. Find the impedance, power

consumed and the phase angle of the circuit. (5x4=20)
PART B
Answer one full question from each module, each question carries 10 marks
Module-I

Calculate the current in each branch of the following circuit using mesh
analysis?

20൨
௦ 5 D
30Q H 402
B E
$ 50೧
2 102
[| 20%
ட்‌ +
പ ട്ടം
100 ४ 50%
OR

Page | of 4

Duration: 90 min

(10)

(10)