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Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Tests  >  Electromagnetic Fields Theory (EMFT)  >  Test: Magnetic Boundary Conditions - Electrical Engineering (EE) MCQ

Test: Magnetic Boundary Conditions - Electrical Engineering (EE) MCQ


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10 Questions MCQ Test Electromagnetic Fields Theory (EMFT) - Test: Magnetic Boundary Conditions

Test: Magnetic Boundary Conditions for Electrical Engineering (EE) 2024 is part of Electromagnetic Fields Theory (EMFT) preparation. The Test: Magnetic Boundary Conditions questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Magnetic Boundary Conditions MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Magnetic Boundary Conditions below.
Solutions of Test: Magnetic Boundary Conditions questions in English are available as part of our Electromagnetic Fields Theory (EMFT) for Electrical Engineering (EE) & Test: Magnetic Boundary Conditions 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: Magnetic Boundary Conditions | 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: Magnetic Boundary Conditions - Question 1
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Find the correct relation between current density and magnetization.

Detailed Solution for Test: Magnetic Boundary Conditions - Question 1

Answer: c
Explanation: The curl of the magnetization gives the magnetic field intensity theoretically. From Maxwell equation, we can correlate that with the current density (Ampere law)

Test: Magnetic Boundary Conditions - Question 2
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The tangential component of the magnetic field intensity is continuous at the boundary of separation of two media. State True/False. 

Detailed Solution for Test: Magnetic Boundary Conditions - Question 2

Answer: a
Explanation: For two medium of separation, the tangential component of the magnetic field intensity will be continuous. This is analogous to the fact that the tangential component of the electric field intensity is continuous at the boundary.

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Test: Magnetic Boundary Conditions - Question 3
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In air, the tangential component of flux density is continuous at the boundary. State True/False.

Detailed Solution for Test: Magnetic Boundary Conditions - Question 3

Answer: a
Explanation: Since the tangential component of the magnetic field intensity will be continuous and B = μH, in air, the tangential component of the flux density will also be continuous.

Test: Magnetic Boundary Conditions - Question 4
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The flux density of medium 1 has a normal component of 2.4 units, then the normal component of the flux density in the medium 2 will be
Detailed Solution for Test: Magnetic Boundary Conditions - Question 4

Answer: c
Explanation: Unlike the electric fields, the magnetic flux density has normal component same in both the mediums. This gives Bn1 = Bn2.

Test: Magnetic Boundary Conditions - Question 5
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The normal component of magnetic field intensity at the boundary of separation of the medium will be
Detailed Solution for Test: Magnetic Boundary Conditions - Question 5

Answer: a
Explanation: The normal component and tangential components of the magnetic flux density will be same. This holds good for any medium.

Test: Magnetic Boundary Conditions - Question 6
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Find the magnetization of the material with susceptibility of 6 units and magnetic field intensity of 13 units.
Detailed Solution for Test: Magnetic Boundary Conditions - Question 6

Answer: c
Explanation: The magnetization is the product of the susceptibility and the magnetic field intensity. Thus M = 6 x 13 = 78 units.

Test: Magnetic Boundary Conditions - Question 7
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Find the ratio of permeability of the two media when the wave is incident on the boundary at 45 degree and reflected by the boundary at 60 degree.
Detailed Solution for Test: Magnetic Boundary Conditions - Question 7

Answer: c
Explanation: From the magnetic boundary conditions, the ratio of permeability μ1/μ2 = tan θ1/tan θ2 and θ1 = 45, θ2 = 60. Thus we get μ1/μ2 = 1/√3. The ratio will be 1:√3.

Test: Magnetic Boundary Conditions - Question 8
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Find the magnetic moment of a material with magnetization 5 units in a volume of 35 units.
Detailed Solution for Test: Magnetic Boundary Conditions - Question 8

Answer: d
Explanation: The magnetization is the ratio of the magnetic moment and the volume. To get moment, put M = 5 and V = 35, thus moment will be 5 x 35 = 175 units.

Test: Magnetic Boundary Conditions - Question 9
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A boundary of separation between two magnetic materials is identified by which factor?
Detailed Solution for Test: Magnetic Boundary Conditions - Question 9

Answer: a
Explanation: Two materials are differentiated by their permeability in case of magnetic and permittivity in case of electric. Thus at the boundary of separation, change in permeability is identified for magnetic materials.

Test: Magnetic Boundary Conditions - Question 10
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A region shown below contains a perfect conducting half-space and air. The surface current  on the surface of the perfect conductor is  amperes per meter. The tangential field in the air just above the perfect conductor is
Detailed Solution for Test: Magnetic Boundary Conditions - Question 10

Concept:
The boundary condition for the tangential magnetic field is given by:

Also, the tangential component of the magnetic field inside a perfect conductor is zero.
Calculation:
Given:

The boundary condition for tangential magnetic field is:

The tangential component of the magnetic field inside a perfect conductor is zero.

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