# 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

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

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
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Appeared in Year: 2021