Electromagnetic Field Theory MCQ Questions & Answers

1

The electric field of an electromagnetic wave at a point in free space is in the positive Y direction and the magnetic field is in the negative X direction. The direction of power flow will be in the

A) +X direction B) +Y direction C) +Z direction D) -Z direction

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

2

The flux and potential functions due to a line charge and due to two concentric circular conductors are of the following form:

A) Concentric circular equipotential lines and straight radial flux lines B) Concentric circular flux lines and straight equipotential lines C) Equipotential due to line charge are concentric cylinders and equipotential due to two conductors are straight lines D) Equipoential due to line charge are straight flat surfaces and those due to two conductors are concentric cylinders

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

3

The continuity of the tangential field component at the interface of two media for normal incidence of a plane wave requires

A) T = 1 - Γ B) T = 1 + Γ C) T = Γ D) T ≠ Γ

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

4

Which of the following relationship correct
Electromagnetic Field Theory mcq question image

A) $${\text{J}} = \frac{{\text{I}}}{{{\text{ab}}}}$$ B) $${\text{J}} = \frac{{\text{I}}}{{{\text{bc}}}}$$ C) $${\text{J}} = \frac{{\text{I}}}{{{\text{ac}}}}$$ D) $${\text{J}} = \frac{{\text{I}}}{{{\text{abc}}}}$$

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

5

A point charge is located at origin. At point (a, a) electric field is E₁. At point (-a, a) the electric field is E₂ and at point (-a, -a) the electric field is E₃.

A) E₁.E₂ = 0 B) |E₁ × E₂| = 0 C) Both E₁.E₂ = 0 and |E₁ × E₃| = 0 D) Neither E₁.E₂ = 0 nor |E₁ × E₃| = 0

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

6

Which is valid Maxwell equation for magnetic flux density.

A) ∇.B = 0 B) ∇ × B = 0 C) V.D = ρ_v D) ∇ × B = J_s

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

7

The electric field intensity $$\overrightarrow E $$ at a point P is given by $$10\hat i + 10\hat j + 10\hat k$$ where $$\hat i,\,\hat j$$ and $${\hat k}$$ are unit vectors in x, y and z directions respectively. If α, β, γ are respectively the angles the $$\overrightarrow E $$ vector makes with x, y and z axes respectively, they are given by which of the following?

A) α = β = γ = 30° B) α = β = γ = 60° C) $$\alpha = \beta = \gamma = {\cos ^{ - 1}}\frac{1}{{\sqrt 3 }}$$ D) $$\alpha = \beta = \gamma = {\cos ^{ - 1}}\frac{1}{3}$$

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

8

As a result of reflections from a plane conducting wall, electromagnetic waves acquire an apparent velocity greater than the velocity of light in space. This is called the

A) velocity of propagation B) normal velocity C) group velocity D) phase velocity

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

9

$${\nabla ^2}H = {\mu _0}{\varepsilon _0}\frac{{{\partial ^2}\overrightarrow H }}{{\partial {t^2}}}$$ is a

A) Subsidiary equation B) Wave equation C) Poission's equation D) Continuity equation

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

10

Consider the following statements:
1. For an isotropic medium, ε is a scalar constant.
2. For a homogeneous medium, ε, µ and σ are constant throughout the region.
3. In an anisotropic medium, D and E have the same direction.
4. For certain crystalline medium, ε varies with the direction of E.
Which of the above crystalline medium, ε varies with the direction of E.

A) 1, 2 and 3 B) 1, 3 and 4 C) 1, 2 and 4 D) 2, 3 and 4

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

Electromagnetic Field Theory MCQ Questions & Answers | ECE