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Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Tests  >  Electromagnetic Fields Theory (EMFT)  >  Test: Brewster Angle - Electrical Engineering (EE) MCQ

Test: Brewster Angle - Electrical Engineering (EE) MCQ


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10 Questions MCQ Test Electromagnetic Fields Theory (EMFT) - Test: Brewster Angle

Test: Brewster Angle for Electrical Engineering (EE) 2024 is part of Electromagnetic Fields Theory (EMFT) preparation. The Test: Brewster Angle questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Brewster Angle MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Brewster Angle below.
Solutions of Test: Brewster Angle questions in English are available as part of our Electromagnetic Fields Theory (EMFT) for Electrical Engineering (EE) & Test: Brewster Angle solutions in Hindi for Electromagnetic Fields Theory (EMFT) course. Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free. Attempt Test: Brewster Angle | 10 questions in 10 minutes | Mock test for Electrical Engineering (EE) preparation | Free important questions MCQ to study Electromagnetic Fields Theory (EMFT) for Electrical Engineering (EE) Exam | Download free PDF with solutions
Test: Brewster Angle - Question 1
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Brewster angle is valid for which type of polarisation?

Detailed Solution for Test: Brewster Angle - Question 1

Answer: b
Explanation: The parallel polarisation of the electromagnetic waves is possible only when the transmission occurs at the Brewster angle.

Test: Brewster Angle - Question 2
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The Brewster angle is expressed as 

Detailed Solution for Test: Brewster Angle - Question 2

Answer: c
Explanation: The tangent of the Brewster angle is the ratio of the refractive indices of the second medium to that of the first medium. It is given by tan θb= n2/n1. Thus the Brewster angle will be θb = tan-1(n2/n1).

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Test: Brewster Angle - Question 3
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The refractive index of a material with permittivity 16 is given by

Detailed Solution for Test: Brewster Angle - Question 3

Answer: c
Explanation: The refractive index is the square root of the permittivity. Thus n = √ε. Given that ε = 16, we get refractive index as n = 4. It has no unit.

Test: Brewster Angle - Question 4
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The reflection coefficient in the wave propagation when it is transmitted with the Brewster angle is
Detailed Solution for Test: Brewster Angle - Question 4

Answer: a
Explanation: Brewster angle propagation refers to complete transmission. The wave transmitted at the Brewster angle will be completely transmitted without reflection. Thus the reflection coefficient will be zero.

Test: Brewster Angle - Question 5
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The transmission coefficient of a wave propagating in the Brewster angle is
Detailed Solution for Test: Brewster Angle - Question 5

Answer: b
Explanation: The transmission coefficient is the reverse of the reflection coefficient. At Brewster angle, the reflection will be zero. Thus the transmission is T = 1-R. Since R = 0, T = 1. It is to be noted that T and R lies in the range of 0 to 1.

Test: Brewster Angle - Question 6
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A circularly polarised wave transmitted at the Brewster angle will be received as linearly polarised wave. State True/False
Detailed Solution for Test: Brewster Angle - Question 6

Answer: a
Explanation: The Brewster angle is said to be the polarisation angle. When a circularly polarised wave is incident at the Brewster angle, the resultant wave will be linearly polarised.

Test: Brewster Angle - Question 7
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An elliptically polarised wave transmitted at the Brewster angle will be received as an elliptically polarised wave. State True/False
Detailed Solution for Test: Brewster Angle - Question 7

Answer: b
Explanation: Any polarised wave transmitted at the Brewster angle will be linearly polarised. It can be a parallel, perpendicular, circular or elliptical polarisation. The resultant wave is always linearly polarised. This is the reason why the Brewster angle is called polarisation angle.

Test: Brewster Angle - Question 8
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Find the Brewster angle of a wave transmitted from a medium of permittivity 4 to a medium of permittivity 2.
Detailed Solution for Test: Brewster Angle - Question 8

Answer: a
Explanation: The Brewster angle is given by θb = tan-1(n2/n1), where n = √ε. Thus we can express the formula in terms of permittivity as θb = tan-1√ (ε 2/ε 1). Here ε1 = 4 and ε2 = 2. Thus we get θb = tan-1√ (2/4) =
tan-1(0.707) = 35.26 degree.

Test: Brewster Angle - Question 9
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Find the ratio of refractive index of medium 2 to that of medium 1, when the Brewster angle is 60 degree.
Detailed Solution for Test: Brewster Angle - Question 9

Answer: d
Explanation: The tangent of the Brewster angle is the ratio of the medium 2 permittivity to the medium 1 permittivity. Thus tan θb = (n2/n1). Given that θb = 60 degree, the ratio n2/n1 will be tan 60 = 1.732.

Test: Brewster Angle - Question 10
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The Brewster angle is the angle of
Detailed Solution for Test: Brewster Angle - Question 10

Answer: a
Explanation: The Brewster angle is the angle of incidence at which complete transmission of the electromagnetic wave occurs.

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