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BARC Quiz 14

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Question 1

Polarization mode dispersion (PMD) is mainly observed in

Question 2

In the terrestrial paths of a microwave communication system, which technique is usually adopted to overcome signal loss due to earth’s curvature?

Question 3

The lowest and the highest critical frequencies of RC driving point admittance are, respectively:

Question 4

A quartz piezoelectric crystal having a thickness of 2 mm and voltage sensitivity of 0.055 V m/N is subjected to a pressure of 1.5 MN/m². The voltage output will be

Question 5

If the z-transform of a system is given by

Where a is real valued,

and ROC

then the system is

Question 6

A Silicon sample A is doped with 10¹⁸ atoms/cm³ pf Boron. Another sample B of identical dimensions is doped with 10¹⁸ atoms/cm³ of phosphorus. The ratio of electron to hole mobility is 3. The ratio of conductivity of the sample A to B is

Question 7

For a random variable x having the PDF shown in the figure given below

the mean and the variance are, respectively

Question 8

A Ge diode has a saturation current of 10μA at 300^oK. Find the saturation current at 400^oK.

Question 9

The 2’s complement subtraction of (7)₁₀ − (11)₁₀ is:

Question 10

Microwave resonators are used in
1) Microwave oscillators
2) Microwave narrow band amplifiers
3) Microwave frequency meters
Which of the above are correct ?

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ESE & GATE EC General

May 30ESE & GATE EC