Description : Cylindrical system is employed in waveguides. State True/False. a) True b) False
Last Answer : a) True
Description : Curl cannot be employed in which one of the following? a) Directional coupler b) Magic Tee c) Isolator and Terminator d) Waveguides
Last Answer : d) Waveguides
Description : Rectangular waveguides dominate the circular waveguides. Find the reason. a) Low cut-off frequency b) Easy to design c) More wave propagation d) The statement is false
Last Answer : b) Easy to design
Description : In waveguides, which of the following conditions will be true? a) V > c b) V < c c) V = c d) V >> c
Last Answer : a) V > c
Description : The Cartesian coordinates can be related to cylindrical coordinates and spherical coordinates. State True/False. a) True b) False
Description : The velocity of a wave travelling in the air medium without transmission lines or waveguides(wireless) is a) 6 x 10 8 b) 3 x 10 8 c) 1.5 x 10 8 d) 9 x 10 8
Last Answer : b) 3 x 10 8
Description : Gauss law can be evaluated in which coordinate system? a) Cartesian b) Cylinder c) Spherical d) Depends on the Gaussian surface
Last Answer : d) Depends on the Gaussian surface
Description : The divergence theorem for a surface consisting of a sphere is computed in which coordinate system? a) Cartesian b) Cylindrical c) Spherical d) Depends on the function
Last Answer : d) Depends on the function
Description : Compute divergence theorem for D = 5r 2 /4 i in spherical coordinates between r = 1 and r = 2 in volume integral. a) 80 π b) 5 π c) 75 π d) 85 π
Last Answer : c) 75 π
Description : Evaluate Gauss law for D = 5r 2 /4 i in spherical coordinates with r = 4m and θ = π/2 as volume integral. a) 600 b) 588.9 c) 577.8 d) 599.7
Last Answer : b) 588.9
Description : Compute divergence theorem for D= 5r 2 /4 i in spherical coordinates between r=1 and r=2. a) 80π b) 5π c) 75π d) 85π
Last Answer : c) 75π
Description : Evaluate Gauss law for D = 5r 2 /4 i in spherical coordinates with r = 4m and θ = π/2. a) 600 b) 599.8 c) 588.9 d) 577.8
Last Answer : c) 588.9
Description : Transform the vector (4,-2,-4) at (1,2,3) into spherical coordinates. a) 3.197i – 2.393j + 4.472k b) -3.197i + 2.393j – 4.472k c) 3.197i + 2.393j + 4.472k d) -3.197i – 2.393j – 4.472k
Last Answer : b) -3.197i + 2.393j – 4.472k
Description : The scalar factor of spherical coordinates is a) 1, r, r sin θ b) 1, r, r c) r, r, 1 d) r, 1, r
Last Answer : a) 1, r, r sin θ
Description : Given B= (10/r)i+( rcos θ) j+k in spherical coordinates. Find Cartesian points at (- 3,4,0) a) -2i + j b) 2i + k c) i + 2j d) –i – 2k
Last Answer : a) -2i + j
Description : Find the spherical coordinates of A(2,3,-1) a) (3.74, 105.50, 56.130) b) (3.74, 105.50, 56.310) c) (3.74, 106.50, 56.130) d) (3.74, 106.50, 56.310)
Last Answer : b) (3.74, 105.50, 56.310)
Description : Choose which of following condition is not required for a waveguide to exist. a) The dimensions should be in accordance with desired frequency b) Cut-off frequency should be minimum 6GHz c) The shape should be spherical d) No specific condition is required for waveguide design
Last Answer : c) The shape should be spherical
Description : Example of spherical system in the following is a) Charge in space b) Charge in box c) Charge in dielectric d) Uncharged system
Last Answer : a) Charge in space
Description : Convert the point (3,4,5) from Cartesian to spherical coordinates a) (7.07,450,530) b) (0.707,450,530) c) (7.07,540,630) d) (0.707,540,630)
Last Answer : a) (7.07,450,530)
Description : Transform the spherical system B = (10/r)i + (10cos θ)j + k into cylindrical form at (5, π/2, -2) a) 2.467i + j + 1.167k b) 2.467i – j + 1.167k c) 2.467i – j – 1.167k d) 2.467i + j – 1.167k
Last Answer : a) 2.467i + j + 1.167k
Description : A charge located at point p (5,300,2) is said to be in which coordinate system? a) Cartesian system b) Cylindrical system c) Spherical system d) Space system
Last Answer : b) Cylindrical system
Description : The cylindrical coordinate system is also referred to as a) Cartesian system b) Circular system c) Spherical system d) Space system
Last Answer : b) Circular system
Description : The spherical equivalent of the vector B = yi + (x + z)j located at (-2,6,3) is given by a) (7,64.62,71.57) b) (7,-64.62,-71.57) c) (7,-64.62,71.57) d) (7,64.62,-71.57)
Last Answer : d) (7,64.62,-71.57)
Description : A charge is placed in a square container. The position of the charge with respect to the origin can be found by a) Spherical system b) Circular system c) Cartesian system d) Space coordinate system
Last Answer : c) Cartesian system
Description : The Cartesian system is also called as a) Circular coordinate system b) Rectangular coordinate system c) Spherical coordinate system d) Space coordinate system
Last Answer : b) Rectangular coordinate system
Description : The polar form of Cartesian coordinates is a) Circular coordinates b) Spherical coordinates c) Cartesian coordinates d) Space coordinates
Last Answer : a) Circular coordinates
Description : The distance vector is obtained in a) Cartesian coordinate system b) Spherical coordinate system c) Circular coordinate system d) Space coordinate system
Last Answer : d) Space coordinate system
Description : Coulomb law is employed in a) Electrostatics b) Magnetostatics c) Electromagnetics d) Maxwell theory
Last Answer : a) Electrostatics
Description : The skin depth is calculated from the amplitude of the wave. State true/false a) True b) False
Description : In P polarisation, the electric field lies in the same plane as the interface. State True/False. a) True b) False
Description : In S polarisation, the electric field lies in the plane perpendicular to that of the interface. State True/False a) True b) False
Description : The Snell law is applicable for perpendicular polarisation and the Brewster law is applicable for parallel polarisation. State True/False. a) True b) False
Description : The angle of incidence is equal to the angle of reflection for perfect reflection. State True/False. a) True b) False
Description : The critical angle is defined as the angle of incidence at which the total internal reflection starts to occur. State True/False. a) True b) False
Description : An elliptically polarised wave transmitted at the Brewster angle will be received as an elliptically polarised wave. State True/False a) True b) False
Last Answer : b) False
Description : A circularly polarised wave transmitted at the Brewster angle will be received as linearly polarised wave. State True/False a) True b) False
Description : The core refractive index should be lesser than the cladding refractive index for a coaxial cable. State True/False a) True b) False
Description : The refractive index of air is unity. State True/False. a) True b) False
Description : The electric and magnetic field components in the electromagnetic wave propagation are in phase. State True/False. a) True b) False
Description : The attenuation in a good dielectric will be non- zero. State True/False. a) True b) False
Description : In free space, the ratio of frequency to the velocity of light gives the phase constant. State True/False. a) True b) False
Description : Harmonic electromagnetic fields refer to fields varying sinusoidally with respect to time. State True/False. a) True b) False
Description : The inductance is proportional to the ratio of flux to current. State True/False. a) True b) False
Description : In air, the tangential component of flux density is continuous at the boundary. State True/False. a) True b) False
Description : The tangential component of the magnetic field intensity is continuous at the boundary of separation of two media. State True/False. a) True b) False
Description : In ferromagnetic materials the susceptibility is infinity. State True/False a) True b) False
Description : The magnetic force impacts the energy of the field. State True/false. a) True b) False
Description : Electromagnetic waves are longitudinal in nature. State True/False. a) True b) False
Description : Inductance is present in semiconductor. State True/False. a) True b) False
Description : The permeability and permittivity of air or free space is unity. State true/false. a) True b) False