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BARC OCES 2022 Quiz 3
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Question 1
A signal m (t) = 3cos (6000πt) + 4 cos (7000πt) + 5cos (10000πt) to be sampled. What is the minimum sampling rate for baseband sampling for truth full representation:
Question 2
The 6V zener diode shown in the figure, has zero zener resistance and a knee current of 5mA. The minimum value of R so that the voltage across it does not fall below 6V is
Question 3
What is 4 point Discrete Fourier Transform of signal x(n) = ( 1, 2, 3, 4 )
Question 4
A 70 MHz carries is QPSK modulated by a 1.544 Mbps T1 data stream. The transmitter employs a raised-cosine filter with 
. What is the transmitted bandwidth of the signal?
. What is the transmitted bandwidth of the signal?Question 5
Consider a system with pipeline to provide speedup of 6.2 at 100MHz and has 70% efficiency. Find the number of stages in pipeline.
Question 6
The minimum point of the function (x3/3) - x is at
Question 7
A semiconductor is uniformly doped with 
acceptors and 
donors. Let the free electron and hole concentrations be 
and 
respectively. Assume that the semiconductor is at thermal equilibrium and that 100% ionization has taken place. Then which of the following is true?
acceptors and donors. Let the free electron and hole concentrations be and respectively. Assume that the semiconductor is at thermal equilibrium and that 100% ionization has taken place. Then which of the following is true? Question 8
An electric flux density vector is given by 
The volume charge density ρv(C/m3) is given by
Question 9
The CRO has a rise time 20 nsec. The rise time of a signal measured by this CRO is 25 msec. The true rise time of signals ___________nsec.
Question 10
A second-order system represented by state variables has
The value of natural frequency and damping ratio are respectively
The value of natural frequency and damping ratio are respectively
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ESE & GATE ECGeneralMar 4ESE & GATE EC
