Electromagnetic Field Theory MCQ Questions & Answers

Electromagnetic Field Theory MCQ Questions & Answers | ECE

Learn Electromagnetic Field Theory MCQ questions & answers are available for a Electronics and Communications Engineering(ECE) students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Electromagnetic Field Theory MCQ question is the important chapter for a Electronics and Communications Engineering(ECE) and GATE students. Page-2 section-3

The maxwell's equation which interprets that isolated magnetic poles do not exist is

A) $$\nabla .\overrightarrow E = \frac{P}{{{\varepsilon _0}}}$$ B) $$\nabla .\overrightarrow B = 0$$ C) $$\nabla \times \overrightarrow E = - \frac{{\partial \overrightarrow B }}{{\partial t}}$$ D) $$\nabla \times \overrightarrow B = {\mu _0}l + \mu {\varepsilon _0} - \frac{{\partial \overrightarrow E }}{{\partial t}}$$

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Answer & Solution

Answer: Option B

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When the electric field is maximum value, the magnetic energy of a cavity is

A) At its maximum value B) At $$\sqrt 2 $$ of its maximum value C) At $$\frac{1}{2}$$ of its maximum value D) Zero

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Answer: Option D

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When waves travel along a transmission line from a generator to load, through which region is power transmission taking place?

A) Only through the conducting region B) Only through the non-conducting regions C) Both through conducting and non-conducting regions D) Through the conducting regions for half a cycle and through the non-conducting regions for the next half cycle

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Answer: Option C

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The electric field lines and equipotential lines

A) Are parallel to each other B) Are one and same C) Cut each other orthogonally D) Can be inclined to each other at any angle

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Answer: Option C

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A shape of homogeneous linear dielectric material of dielectric constant ≥ 1 is placed in a uniform electric field E₀, then the electric field E that exists inside the sphere is:

A) Uniform and E ≤ E₀ B) Uniform and E ≥ E₀ C) Varies but E < E₀ always D) Varies but E > E₀ always

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Answer: Option C

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The total flux at the end of a long bar magnet is 500 µWb. The end of the bar magnet is withdrawn through a 1000-turn coil in $$\frac{1}{{10}}$$ second. The e.m.f. generated across the terminals of the coil is:

A) 5 V B) 10 V C) 25 V D) 50 V

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Answer: Option A

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The wave propagation in plasma is known as

A) Parametric dispersion B) Solution dispersion C) Spherical dispersion D) Cylindrical dispersion

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Answer: Option A

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What will be the equipotential surfaces for a pair of equal and opposite line charges?

A) Spheres B) Concentric cylinders C) Non-concentric cylinder D) None of the above

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Answer: Option C

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The fundamental postulate of magnetostatic $$\nabla \overline {\text{B}} = 0$$ in free space is based on

A) Biot Savart Law B) Ampere's Law C) Faraday's Law D) Law of conservation of magnetic flux

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Answer: Option D

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Slotted line with tunable probe is not used to measure

A) VSWR B) Wavelength C) Power D) Impedance

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Answer: Option C

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