Reg NO.) - வவ வை ॥ 1

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIRST/SECOND SEMESTER B.TECH DEGREE EXAMINATION, APRIL 2018

Course Code: EE100
Course Name: BASICS OF ELECTRICAL ENGINEERING

Max. Marks: 100 : Duration: 3 Hours
PART A

Answer all questions, each question carries 4 marks. Marks

1 8) What is the difference between current source and voltage source? (2)

b) Draw the VI or IV characteristics of ideal & practical voltage and current sources. (2)

2 ஐ Howmuch more current can be safely drawn from a 120 V outlet fused at 15 A, (2)
if a 600 W curling iron and a 1200W hair dryer are already operating in the circuit?

b) A certain light bulb with a resistance of 95 Q is labelled ‘/50 W’. Was this bulb (2)
designed for use in a 120V circuit or a 220V circuit? Justify your answer.
3 2) An ideal mutual inductor is made from a primary coil of inductance SmH and (2)
a secondary coil of inductance 10mH.Find the value of the mutual Inductance.

b) A DC source of 20% is applied to a series combination of ೩ 5kQ resistor and (2)
a 4mH inductor. Find the equilibrium value of the energy stored in the magnetic
field.
4 Derive the relation between line current and phase current when a balanced (4)
3-phase three wire supply is fed to a 3-phase delta connected pure resistive load
(R Q of equal value connected in each arm).

5 a) Define renewable energy. (1)
b) Enumerate major types of geothermal renewable energy resources. (3)
6 What do you mean by distribution system? How feeder is different from (4)
distributor?
7 Derive the emf equation of transformer. (4)
8 What is the principle of operation of a DC motor? What are the constructional (4)
differences between series and shunt field windings?
9 Distinguish between squirrel cage and slip ring rotors of 3-phase induction motor. (4)
10 Compare three-phase and single-phase induction motors. (4)
PART B

MODULE (1-4)
Answer any four questions, each question carries 10 marks.
11 a) Obtain the voltage drops across all resistor of the circuit shown in Fig. 1 using (6)
nodal analysis. All the values of the resistances are in Q.

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