Electromagnetics [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 86 - 89 of 96

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Question 86

Electromagnetics
Characteristic Impedance

Appeared in Year: 2015

Question

MCQ▾

Consider the long lossless air-filled transmission line shown in the figure. It has a characteristic impedance of , is terminated by a short circuit, and is excited with a frequency of . what is the nature of the input impedance ?

The Nature of the Input Impedanoe

Choices

Choice (4)Response

a.

Capacitive

b.

Inductive

c.

Short

d.

Open

Question 87

Electromagnetics
Characteristic Impedance

Appeared in Year: 2016

Question

MCQ▾

The propagation constant of a lossy transmission line is and its characteristic impedance is at rad . The values of the line constant are, respectively,

Choices

Choice (4)Response

a.

b.

c.

d.

Question 88

Electromagnetics
Wave Equation

Appeared in Year: 2015

Question

Numeric Answer▾

Consider a uniform plane wave with amplitude of and frequency travelling in air, and incident normally on a dielectric medium with complex relative permittivity and permeability as shown in the figure.

Consider a Uniform Plane

The magnitude of the transmitted electric field component after it has travelled 10 cm inside the dielectric region is …

Question 89

Electromagnetics
Gain and Directivity
Edit

Appeared in Year: 2021

Question

Numeric Answer▾

An antenna with a directive gain of 6 dB is radiating a total power of 16 kW. The amplitude of the electric field in free space at a distance of 8 km from the antenna in the direction of 6 dB gain (rounded off to three decimal places) is ________ V/m.

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