Visvesvaraya Technological University (VTU) 2007 B.E Electrical and Electronics Engineering Model QP Basc Electrical set 1/3 - Question Paper

SET - I
MODEL ques. PAPER
06 ELE 15/25 - BASIC ELECTRICAL ENGINEERING
(Answer any five ques. by selecting at lowest 2 ques. from every part.)
PART – A
1a) State and discuss Kirchhoff’s laws. six
b) Prove the relation ranging from the self and mutual inductance six
c) issue on D.C. circuit/magnetic circuit. eight
2a) describe the RMS and avg. value of a sinusoidal emf wave and find their
expressions. eight
b) describe i) real power, ii) reactive power and iii) apparent power as applied single

Phase a.c circuits. six
c) issue on single phase a.c. circuit. six
3a) List out the advantages of 3 phase system compared to single phase systems. four
b) Show that 2 watt meters are sufficient to measure total power in 3 phase

Balanced circuit . eight
c) issue on 3 phase circuits eight
4a) discuss with a neat sketch the working of dynamometer kind wattmeter. six
b) With relevant circuit discuss how a lamp can be controlled from 3 various

points and where it is preferred. six
c) discuss the necessity of Earthing and with a neat sketch any 1 method of

Earthing eight
PART - B
5a) discuss with a neat sketch the constructional features of a D.C. machine
and mention the functions of every part. eight
b) discuss the principle of the production of torque in D.C. motors. six
c) issue on D.C.Motors or Generators. six
6a) discuss the principle of operation of a single phase transformer. four
b) With relevant diagrams distinguish ranging from the core kind and shell kind

transformers eight
c) issue on transformer. eight
7a) Mention the various kinds of synchronous generators and discuss the
construction of every kind with relevant diagram. eight
b) Derive the EMF formula of an alternator. six
c) issue on alternator. six
8a) discuss why Induction motors never run at synchronous speed. six
b) Compare the squirrel cage kind with the slip ring Induction motor and
mention their applications. eight
c) issue on Induction Motor. six

Earning:   Approval pending.