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Test: Magnetostatic Properties


10 Questions MCQ Test Electromagnetic Fields Theory | Test: Magnetostatic Properties


Description
This mock test of Test: Magnetostatic Properties for Electronics and Communication Engineering (ECE) helps you for every Electronics and Communication Engineering (ECE) entrance exam. This contains 10 Multiple Choice Questions for Electronics and Communication Engineering (ECE) Test: Magnetostatic Properties (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Magnetostatic Properties quiz give you a good mix of easy questions and tough questions. Electronics and Communication Engineering (ECE) students definitely take this Test: Magnetostatic Properties exercise for a better result in the exam. You can find other Test: Magnetostatic Properties extra questions, long questions & short questions for Electronics and Communication Engineering (ECE) on EduRev as well by searching above.
QUESTION: 1

The magnetostatics highly relies on which property?

Solution:

Answer: c
Explanation: The magnetostatics highly relies on the inductance of the magnetic materials, which decides its behavior in the influence of magnetic field.

QUESTION: 2

The inductance is the measure of

Solution:

Answer: b
Explanation: The inductance is a property of an electric conductor/coil which measures the amount of emf generated by passing current through the coil.

QUESTION: 3

Find the total flux in a coil of magnetic flux density 12 units and area 7 units.

Solution:

Answer: a
Explanation: The total flux in a coil is defined by φ = BA, where B = 12 and A = 0.07. On substituting these values, we get φ = 12 x 0.07 = 0.84 units.

QUESTION: 4

Find the energy of a coil of inductance 18mH and current passing through it 1.25A.(in 10-3order) 
Solution:

Answer: a
Explanation: The magnetic energy possessed by a coil is given by E = 0.5 x LI2. Put L = 18 x 10-3 and I = 1.25, thus we get E = 0.5 x 18 x 10-3 x 1.252 = 14.06 x 10-3 units.

QUESTION: 5

Using Maxwell equation which of the following cannot be calculated directly?
Solution:

Answer: c
Explanation: The Maxwell equations can be used to compute E,H,D,B and J directly. It is not possible to find the magnetic vector potential A directly.

QUESTION: 6

Which of the following relation will hold good?
Solution:

Answer: d
Explanation: The magnetic flux density is the product the permeability and the magnetic field intensity. This statement is always true for any material (permeability).

QUESTION: 7

The permeability and permittivity of air or free space is unity. State true/false. 
Solution:

Answer: b
Explanation: The permeability and permittivity of free space or air is always unity. This implies that the air is always ready to store electric or magnetic charges subjected to it.

QUESTION: 8

Choose the best relation. 
Solution:

Answer: c
Explanation: For any magnetic field, the magnetic field intensity will be the negative gradient of the potential of the field. This is given by H = -Grad(V).

QUESTION: 9

Find the magnetic field when the magnetic vector potential is a unit vector.
Solution:

Answer: c
Explanation: We know that H = -Grad(V), where is a unit vector. The gradient of a constant/unit vector will be zero. Thus the magnetic field intensity will be zero.

QUESTION: 10

Find the force experienced by an electromagnetic wave in a conductor?
Solution:

Answer: d
Explanation: The electromagnetic wave experiences Lorentz force which is the combination of the electrostatic force and magneto static force. It is given by F = QE + Q(V X B).

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