Electromagnetics [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 90 - 93 of 96

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Question 90

Electromagnetics
S-Parameters, Smith Chart

Appeared in Year: 2020

Question

MCQ▾

The impedances Z = jX, for all X in the range , map to the Smith chart as

Choices

Choice (4)Response

a.

a point at the centre of the chart.

b.

a circle of radius 1 with centre at (0,0) .

c.

a circle of radius 0.5 with centre at (0.5,0) .

d.

a line passing through the centre of the chart.

Question 91

Electromagnetics
Propagation and Skin Depth

Appeared in Year: 2021

Question

Numeric Answer▾

Consider the vector field in a rectangular coordinate system with unit vectors and . If the field F is irrotational (conservative) , then the constant (in integer) is ________

Question 92

Electromagnetics
Characteristic Impedance

Appeared in Year: 2020

Question

Numeric Answer▾

A transmission line of length and having a characteristic impedance of 50 is terminated with a load of 400 . The impedance (rounded off to two decimal places) seen at the input end of the transmission line is ________ .

Question 93

Electromagnetics
Light Propagation in Optical Fibers
Edit

Appeared in Year: 2021

Question

Numeric Answer▾

The refractive indices of the core and cladding of an optical fiber are 1.50 and 1.48, respectively. The critical propagation angle, which is defined as the maximum angle that the light beam makes with the axis of the optical fiber to achieve the total internal reflection. (Rounded off to two decimal places) is ________ degree.

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