ECE :: Exam Questions Paper
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Consider the following statements:
- With increase in temperature Fermi-level tries to come in between the energy gap exactly at middle
- Mobility of electron in GaAs is very high compared to mobility of hole
- In LED, the light energy radiated due to recombination with the aid of traps.
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For good quality signal transmission all frequency components should have the same transmission delay, td and same phase shift-Φs. What can be said about the statement?
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The following series RLC circuit with zero initial conditions is excited by a unit impulse function δ(t)
For t > 0, the voltage across the resistor is -
In a CMOS CS amplifier, the active load is obtained by connecting a
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An audio signal is band limited to 4 kHz. It is sampled at 8 kHz. What will be the spectrum of the sampled signal?
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Consider the equation s2 + 2s + 2 + K(s + 2) = 0. Where do the roots of this equation break on the root loci plot?
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The characteristic equation of a closed loop system is (s + 2) (s + 3) + K = 0. The centroid of the asymptotes in root locus is:
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The number of roots of s3 + 2s2 + 7s + 3 = 0 in the left half of the s-plane is :
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Consider a feedback control system with open loop transfer function
The type of the closed loop system is __________ .
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