ECE :: Exam Questions Paper
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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?
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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. -
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: -
An amplitude modulated signal occupies a frequency range from 395 kHz to 405 kHz. If can be demodulated by which of the following?
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Radiation efficiency of an antenna is defined as the ratio of
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Which of the following factors are responsible to design IC logic gates to operated at a fixed supply voltage of 5 volts?
- Low heating of IC logic gates
- Compatibility with other logic gates
- Satisfactory and safe operation
- Standardization from IC manufacturing point of view.
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Which of the following meters requires an external power source for its operation?
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Which are of the following oscillators is well suited for the generation of wide range audio-frequency sine waves?
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The transfer function of a controller is given as Kp + Kd.s where Kp and Kd are constants. What type of controller is this?
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A.
Total power radiated by an antenna to the net power accepted by the antenna from the connected transmitter
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B.
The frequency at which minimum power is radiated to the frequency at which maximum power is radiated
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C.
Total power accepted from the transmitter to total power generated by the transmitter
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D.
Power in main lobe to that in the side lobe
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