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ESE EE 2021 Technical Quiz 10

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Question 1

The depletion capacitance, Cj of an abruptly p-n junction with constant doping of either side varies with reuses biased voltage VR as.

Question 2

Consider the following statements about channel coding and source coding.

1. Channel coding is dual of source coding.

2. Channel coding introduces controlled redundancy to improve reliability

3. Source coding reduces redundancy to improve efficiency.

Which of the above statements are correct?

Question 3

Find slope of magnitude plot in dB/dec if Transfer function consists of 4 poles and 2 zeros.

Question 4

A uniform metallic wire has a resistivity of 1.2×10–8 Ω–m. What is the average drift velocity if there are 6 × 1026 electrons/m3 and electric field of 1 V/cm.

Question 5

In the equivalent circuit of phase induction motor, the components of equivalent rotor resistance based on double revolving field theory are:

Question 6

A power diode has softness factor equal to unity, then diode is known as:

Question 7

The annual load factor and plant capacity factor of a power station are 60% and 40% respectively. If the maximum demand of power plant is 20000 kW, then the reserve capacity of plant is:

Question 8

A signal  is sampled at 150 Hz and  is sampled at fs. What is the value of fs so that both the sequences of samples will be identical.

Question 9

Consider the following statements:

1. The magnitude of magnetic field strength H is independent of permeability of the medium.

2. A non-zero value of rate of change of magnetic flex maybe due to relative motion between a steady flux and a closed path.

3. Electric flux through a surface area is the integral of parallel component of the field over the area.

Which of the above statements is/are correct?

Question 10

Which of the following are analog to digital converters?

1. Weighted resistor type

2. R–2R Ladder

3. Dual slope

4. Flash type

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May 24ESE & GATE EE