UPSC IES exam Electrical Engineering Paper (I) Conventional Exam paper

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16. A unity feedback system with open loop
transfer function of 20
is excited by a
s(s + 5)
, unit step input. How much tiqe will be
required for the response to settle within 2%
of final desired value ?
(a) 0.25 sec
(b) 1.60 sec
(c) 2.40 sec
(dl 4.00 sec

consider the following statements :
1. + Amplifier gain and phase shift.
2. Filter transfer functions.
3. Two port network parameters.
4. I'awcr gain in a two port circuit.

Which of the above quantities can be
measured using a vector voltmeter ?
(a) 1 and 3 only
Cb) 1 , 2 a n d 4
(c) 1,2and3
(d) 3 and 4

A barium titanate crystal has a thickness of
2 mm. Its voltage sensitivity is
12 x lo3 Vm/N. It is subjected to a pressure
of 0.5 MN/T~~. What is the voltage generated ?
(a) 3 V
(b) 6 V
(c) 5 v
(dj 12V

The impulse response of a second-order
under-damped system started from rest is
given by : ;
C(t) = 12.5 e-6t sin at, t 2 0
What are the natural frequency and the
damping factor of the system respectively ?
,(a) 10'and 0.6
(b) 10 and 0-8
(c) 8 &id 0.6
(dl 8 and 0.8

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