Test: Electromagnetic Wave Propagation - Electronics and Communication Engineering (ECE) MCQ

A non magnetic medium has an intrinsic impedance 360∠30^o Ω

Que: The Dielectric constant is

The amplitude of a wave traveling through a lossy nonmagnetic medium reduces by 18% every meter. The wave operates at 10 MHz and the electric field leads the magnetic field by 24^o

Que: The propagation constant is

The amplitude of a wave traveling through a lossy nonmagnetic medium reduces by 18% every meter. The wave operates at 10 MHz and the electric field leads the magnetic field by 24^o

Que: The skin depth is

A 60 m long aluminium (σ = 3.5 x 10⁷ S/m, μ_r = 1, ε₂ = 1) pipe with inner and outer radii 9 mm and 12 mm carries a total current of 16 sin(10⁶ πt)A. The effective resistance of the pipe is 

Silver plated brass wave guide is operating at 12 GHz. If at least the thickness of silver ( σ = 6.1 x 10⁷ S/m, μ_r = ε_r = 1 ) is 5 δ the minimum thickness required for wave-guide is

A uniform plane wave in a lossy nonmagnetic media has

The magnitude of the wave at z = 4 m and t = T/8 is

A uniform plane wave in a lossy nonmagnetic media has

Que: The loss suffered by the wave in the interval 0 < z < 3 m is

Region 1, z < 0 and region 2, z > 0, are both perfect dielectrics. A uniform plane wave traveling in the u_z direction has a frequency of 3 x 10¹⁰ rad /s. Its wavelength in the two region are  λ₁ = 5 cm and  λ₂ = 3 cm.

Que: On the boundary the reflected energy is

Region 1, z < 0 and region 2, z > 0, are both perfect dielectrics. A uniform plane wave traveling in the u_z direction has a frequency of 3 x 10¹⁰ rad /s. Its wavelength in the two region are  λ₁ = 5 cm and  λ₂ = 3 cm.

Que: The SWR is

A uniform plane wave is incident from region 1 ( μ_r = 1, σ = 0) to free space. If the amplitude of incident wave is one-half that of reflected wave in region, then the value of ε_r is

A 150 MHz uniform plane wave is normally incident from air onto a material. Measurements yield a SWR of 3 and the appearance of an electric field minimum at 0.3λ in front of the interface. The impedance of material is

A plane wave is normally incident from air onto a semi-infinite slab of perfect dielectric (ε_r = 3.45) . The fraction of transmitted power is

Consider three lossless region :

Que: The lowest frequency, at which a uniform plane wave incident from region 1 onto the boundary at z = 0 will have no reflection, is

Consider three lossless region :

Que: If frequency is 50 MHz, the SWR in region 1 is

A uniform plane wave in air is normally incident onto a lossless dielectric plate of thickness  λ/8 , and of intrinsic impedance  η = 260 Ω. The SWR in front of the plate is

The E-field of a uniform plane wave propagating in a dielectric medium is given by

The dielectric constant of medium is

An electromagnetic wave from an under water source with perpendicular polarization is incident on a water-air interface at angle 20^o with normal to surface. For water assume ε_r = 81, μ_r = 1. The critical angle θ_c is