Test: Electromagnetic Waves- 2 - Electrical Engineering (EE) MCQ

An elliptically polarized wave travelling in the +z direction in air has x and y components
E_x = 2 sin(ωt - βz) V/m;
E_y = 4 sin(ωt - βz + 75°) v/m
The average power per unit area conveyed by the wave is

Consider the following statements:
1. A wave whose phase is constant over a set of planes is called plane wave.
2. A wave whose phase is constant while magnitude is variable is called uniform plane wave.
3. The fields are non-uniform over plane surfaces.
4. Earth is considered as good conductor in one part of the radio frequency range and as dielectric in other frequency range.
Which of the above statements is/are not correct?

Assertion (A): Displacement current directly passes through the capacitor.
Reason (R): The current through a capacitive element is called displacement current.

In a homogeneous, isotropic, linear and stationary media, a plane electromagnetic wave has the following characteristics.

Assertion (A): The distance to which a wave penetrates a conductor is known as depth of penetration.
Reason (R): The depth of penetration (δ) is defined as that depth in which the wave has been attenuated to ‘e’ percent of its original value.

The polarization of a dielectric is given by

In a travelling electrom agnetic wave, E and H vector fields are

A wave is incident normally on a good conductor. If the frequency of a plane electromagnetic wave increases four times, the skin depth, will

The electric field of a travelling wave is given by 100 cos(10^9t - 4x). The velocity and the wavelength are respectively.

In a dielectric-conductor boundary (interface), the tangential component of electric field is

Which of the following statements is not true of waves in general?

When an EM wave is incident on a dielectric, it is

Poynting vector gives

Match List-I with List-II and select the correct answer using the codes given below the lists:
List-I
A. Free space
B. Lossless dielectrics
C. Lossy dielectrics
D. Good conductors
List-lI
1. σ ≠ 0, ε = ε₀ε_r, μ = μ₀μ_r 
2. σ = 0, ε = ε₀, μ = μ₀
3. σ ≈ ∞, ε = ε₀, μ = μ₀μ_r
4. σ = 0, ε = ε₀ε_r, μ = μ₀μ_r   

Codes:
    A B C D
(a) 4 2 3 1
(b) 2 4 1 3
(c) 4 2 1 3
(d) 2 4 3 1

Match List-I (EM phenomena) with List-ll (Uses) and select the correct answer using the codes given below the lists:
List - I
A. Cosmic rays
B. Ultraviolet radiation
C. Infra-red radiation
D. Gamma rays
List - II
1. Sterilization
2. Cancer therapy
3. Astronomy
4. Photography
Codes:
     A B C D
(a) 4 3  2 1
(b) 3 4  1 2
(c) 1 2  3 4
(d) 3 1 4  2

A lossy dielectric has an intrinsic impedance of 200∠30° Ω at a particular frequency. If, at that frequency, the plane wave propagating through the dielectric has the magnetic field component 

the skin depth will be

What is the major factor for determining whether a mediam is free space, lossless dielectric, or good conductor?