Electronics and Communication Engineering - Exam Questions Papers
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41.
The characteristic equation of a control system is given as s4 + 8s3 + 24s2 + 32s + K = 0. What is the range of values of K for this system to be stable?
42.
If a vector field
is related to another vector field
through
which of the following is true? Note: C and Sc refer to any closed contour and any surface whose boundary is C.



43.
A scheme shown below is to generate a wide band FM modulate signal.
Narrow band FM has carrier frequency = 400 KHz
Deviation ratio = 0.2
Wide band FM has carrier frequency = 100 MHz
Deviation ratio = 6
Frequency multiplication factor is:

Narrow band FM has carrier frequency = 400 KHz
Deviation ratio = 0.2
Wide band FM has carrier frequency = 100 MHz
Deviation ratio = 6
Frequency multiplication factor is:
44.
An amplitude modulated signal occupies a frequency range from 395 kHz to 405 kHz. If can be demodulated by which of the following?
45.
Following one is moving average system __________ .
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