APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY Previous Years Question Paper & Answer

Course : B.Tech

Semester : SEMESTER 6

Subject : Comprehensive Exam

Year : 2019

Term : DECEMBER

Scheme : 2015 Full Time

Course Code : EC 352

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Which of the following can be most appropriately associated with the design space of a ball?
a) Speed b) Velocity c) Diameter d) Height
PART B- CORE COURSES

A voltage source has 10 V across its terminals when no load is connected. With a load current of
2 A, the voltage across the terminals of the source drops to 9.5 V. What is the value of the
internal resistance of the voltage source?

a) 0.254 b) 5Q ௦) 4.75 ६2 ५) 0.5 ६2

The value of source resistance of a voltage source of 10 V is 100൨. What is the value of
maximum power that can be transferred to a load resistor which is connected to this source?

a) 10W 0) 0.25 W ௦) 1 ४४ ५) 717

A current pulse 58(1) is forced through a capacitor C. The voltage V,(t) across the capacitor is
given by

a) 51 0) 0-6 c) 50/6 ५) 5u(t)/C
At poles, the Network function N(s) becomes
a) zero b) One c) Oscillatory d) Infinity

Which among the following represents the condition for reciprocity of a network in terms of
transmission parameters?

a) AB-—CD=1 b) ^> - 80 -1 c) A=D d) AC-—BD=l

Two coupled coils connected in series have an equivalent inductance of 24mH or 16mH
depending on the interconnection. Then the mutual inductance M between the coils is

a) 12mH b) 8mH c) 4mH ५) 2mH

Which among the following gets cancelled under the resonance condition in ac circuits, if
inductive and capacitive reactances are in parallel?

a) Reactance 0) Susceptance c) Resistance d) None of these

The system described by the relationship, y[n]=2"x[n] is

a) Alwaysunstable b) Sometimes c) stable d) Notable to
unstable predict about
stability

When two systems are connected in parallel, the overall impulse response is
३) h,[n]*h,[n] 0) 11[1].12[1] €) h,[n]+h,[n] ५) 11[1]-12|[1]

The spectrum of periodic impulse train is

a) Unit step b) Constant value c) Periodicimpulse d) Periodic sine and
train cosine signals
When a signal is sampled, its spectrum
a) Is also sampled b) Becomes periodic 6) oscillates d) Remains the
same

If the DTFT of x[n] is X(o), then the DTFT of ८४०००, [1] is,
a) ९०००९ (@) 0) 6४००० (७) €) (७-७०) ५) X(@+0)

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