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ESE EC 2021 Technical Quiz 10
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Question 1
Statement (1): A memory less system is causal.
Statement (2): A system is causal if the output at any time depends only on the values of input at that time and in the past.
Question 2
In a semiconductor at 300K with
is converted to an extrinsic semiconductor with doping concentration of
. The shift in Fermi level due to doping is?
is converted to an extrinsic semiconductor with doping concentration of. The shift in Fermi level due to doping is?
Question 3
For a 2.4 m parabolic dish antenna the minimum distance required for far field measurement is given by 150 m. The approximate operating frequency of the antenna will be?
Question 4
The circuit shown below has R = 100 Ω, Rc = 2kΩ, RL = 2kΩ. Also, assume a constant diode voltage of 0.6 V and capacitors are very large using the signal model for Vc = 1.6 V.
What is the Q-point value of the diode current (in mA) and the value of 
is
Question 5
What is the range for microwave frequencies?
Question 6
An n-bit Analog to Digital converter is required to convert analog i/p in the range of (0 – 5) volt with an accuracy of 20 millivolts. The value of ‘n’ (in integer value) is?
Question 7
Which one of the following controller can be used to reduce the peak overshoot without changing the steady state error?
Question 8
The following program is executed on 8085 microprocessor. After execution the contents of PSW register is
MVI A, 80H
MOV B, A
CMA
XRI FFH
CMP B
Question 9
Consider a signal 
. If the peak frequency deviation produced is 50 KHz, the value of FOM in case of phase modulated signal (PM) is _______
. If the peak frequency deviation produced is 50 KHz, the value of FOM in case of phase modulated signal (PM) is _______Question 10
Which of the following material is considered most suitable material for RTDs used in laboratory and why?
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