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V1109 Pages: 5

The no. of independent loops for a network with N nodes and B branches is

a) N-1 0) 8-0 €) B-N+1 d) Independent of
number of nodes
A parallel combination of two resistors, each of R Q, is in series with a parallel combination of
two capacitors of capacitance C each is fed from a DC source. The time constant of the circuit

would be
a) CR b) 2CR

When two coupled coils of equal self inductances are connected in series in one way, the net
inductance is 12 mH. When they are connected in the other way, the net inductance is 4 mH.
The maximum value of net inductance when they are connected in parallel in a suitable way is

൭ CR/4 d) ന്ഥ

a) 2mH b) 3mH c) 4mH ५) ம்‌!
A two-port network is symmetrical if
೩) ൧5൧21 0) AD-BC=1 €) ൧൮5൧2 0( 1112= - 121
A polynomial (5) is Hurwitz if
a) q(s)isrealwhensis 2) q(s)isrealand 0) q(s) has d) None of these
real have real roots conjugate pair
which are zero of complex
or negative roots

Choose a conventional source of energy from the following:

a) Nuclear b) Wind

Transposition of a 3 phase transmission line helps in

a) Tofind LandC b) Increasing L and

त

c) Solar ५) Tidal

of the 3 phases

Pin insulators are normally used up to voltage of about

a) 100 0५ ७) 6609५

c) Toreduce supply 0) Equalizing L and
frequency 6
०) 33kV ५) 250kV

HVDC transmission lines are more economical for

a) Long distance b) Short distance
transmission transmission
Distance Relays are used for the protection of

a) Generator b) Transformer
Buchholz relay is used to protect against

a) Internal fault b) External fault

c) Interconnected d)
System

Hybrid System

c) Transmission line त) 805 bar

c) Rotor fault d) All of the above

Select a suitable winding for DC generator for generating large current

a) Progressive wave b) Lap winding
winding

The efficiency of a ‏عل‎ machine is maximum when

a) Copper loss =
hysteresis loss
Starters are used in DC motors because

b) Hysteresis loss =

Page 4 of 5

Eddy current loss

© Retrogressive d) Wave winding

wave winding

Constant Loss=
Variable Loss

€) Eddycurrentloss_ 6)
= Copper Loss