NTA-NET (Based on NTA-UGC) Electronic Science (Paper-II): Questions 46 - 48 of 124

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Question number: 46

» Linear Integrated Circuits and Op-Amps » Active Filters

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Appeared in Year: 2018

MCQ▾

Question

Thermal noise is passed through an ideal low-pass filter having cut-off at = . The auto-correlation value of the noise at the output of the filter is given as: (July)

Choices

Choice (4) Response

a.

A delta function at

b.

Triangular function over the range-

c.

Since function over the range -

d.

Gaussian over the range

Question number: 47

» Optical Communication » Characteristic Parameters

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Appeared in Year: 2018

MCQ▾

Question

A multimode grade index fibre, exhibits total pulse broadening of over a distance of . Following data is estimated by using the concept of that there is no inter-symbol interference:

1) The maximum possible bandwidth is

2) The dispersion per unit length is

3) The maximum possible B. W. is

4) The dispersion/unit length is

Which is the correct option? (July)

Choices

Choice (4) Response

a.

3) and 4)

b.

2) and 3)

c.

1) and 2)

d.

1) and 4)

Question number: 48

» Microwave Communications » Solid State Microwave Devices » PIN Diode for Detection of Microwaves

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Appeared in Year: 2018

MCQ▾

Question

A TRAPATT diode has the following parameters:

Doping concentration

Current density

The avalanche zone velocity of carriers is given by: (July)

Choices

Choice (4) Response

a.

b.

c.

d.