Description : Solids do not have which type of polarisation? a) Ionic b) Orientational c) Interfacial d) Electronic
Last Answer : c) Interfacial
Description : Identify which type of polarisation depends on temperature. a) Electronic b) Ionic c) Orientational d) Interfacial
Last Answer : c) Orientational
Description : The charge build up in a capacitor is due to a) Conduction current density b) Displacement current density c) Polarisation d) Magnetization
Last Answer : b) Displacement current density
Description : The total polarisation of a material is the a) Product of all types of polarisation b) Sum of all types of polarisation c) Orientation directions of the dipoles d) Total dipole moments in the material
Last Answer : b) Sum of all types of polarisation
Description : Identify the polarisation of the wave given that, Ex = 2 sin wt and Ey = 3 sin wt. a) Linear b) Elliptical c) Circular d) Parallel
Last Answer : a) Linear
Description : Identify the polarisation of the wave given that, Ex = 2 cos wt and Ey = cos wt. a) Elliptical b) Circular c) Parallel d) Linear
Last Answer : d) Linear
Description : Identify the polarisation of the wave given, Ex = cos wt and Ey = sin wt. The phase difference is -90 0 . a) Left hand circularly polarised b) Right hand circularly polarised c) Left hand elliptically polarised d) Right hand elliptically polarised
Last Answer : b) Right hand circularly polarised
Description : Identify the polarisation of the wave given, Ex = 2 cos wt and Ey = 2 sin wt. The phase difference is +90 0 . a) Left hand circularly polarised b) Right hand circularly polarised c) Left hand elliptically polarised d) Right hand elliptically polarised
Last Answer : a) Left hand circularly polarised
Description : Identify the polarisation of the wave given, Ex = 2 cos wt and Ey = sin wt. The phase difference is -90 0 . a) Left hand circularly polarised b) Right hand circularly polarised c) Left hand elliptically polarised d) Right hand elliptically polarised
Last Answer : d) Right hand elliptically polarised
Description : Identify the polarisation of the wave given, Ex = Exo cos wt and Ey = Eyo sin wt. The phase difference is +90 0 . a) Left hand circularly polarised b) Right hand circularly polarised c) Left hand elliptically polarised d) Right hand elliptically polarised
Last Answer : c) Left hand elliptically polarised
Description : The Brewster angle is valid for which type of polarisation? a) S polarised b) P polarised c) Elliptical d) Linear
Last Answer : b) P polarised
Description : The magnitude of the Ex and Ey components are same in which type of polarisation? a) Linear b) Circular c) Elliptical d) Perpendicular
Last Answer : b) Circular
Description : Brewster angle is valid for which type of polarisation? a) Perpendicular b) Parallel c) S polarised d) P polarised
Last Answer : b) Parallel
Description : In P polarisation, the electric field lies in the same plane as the interface. State True/False. a) True b) False
Last Answer : a) True
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 : When the polarisation of the receiving antenna is unknown, to ensure that it receives atleast half the power, the transmitted wave should be a) Linearly polarised b) Elliptically polarised c) Circularly polarised d) Normally polarised
Last Answer : c) Circularly polarised
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 : For a non-zero Ex component and zero Ey component, the polarisation is a) Parallel b) Perpendicular c) Elliptical d) Circular
Last Answer : a) Parallel
Description : When the Ex and Ey components of a wave are not same, the polarisation will be a) Linear b) Elliptical c) Circular d) Parallel
Last Answer : b) Elliptical
Description : When the phase angle between the Ex and Ey component is 0 0 or 180 0 , the polarisation is a) Elliptical b) Circular c) Linear d) Perpendicular
Last Answer : c) Linear
Description : The benefit of Maxwell equation is that a) Any parameter can be calculated b) Antenna can be designed c) Polarisation of the wave can be calculated d) Transmission line constants can be found
Last Answer : a) Any parameter can be calculated
Description : When a dielectric loses its dielectric property, the phenomenon is called a) Dielectric loss b) Dielectric breakdown c) Polarisation d) Magnetization
Last Answer : b) Dielectric breakdown
Description : In isotropic materials, which of the following quantities will be independent of the direction? a) Permittivity b) Permeability c) Polarisation d) Polarizability
Last Answer : a) Permittivity
Description : Calculate the polarisation vector in air when the susceptibility is 5 and electric field is 12 units. a) 3 b) 2 c) 60 d) 2.4
Last Answer : c) 60
Description : Calculate the energy stored per unit volume in a dielectric medium due to polarisation when P = 9 units and E = 8 units. a) 1.77 b) 2.25 c) 36 d) 144
Last Answer : c) 36
Description : Calculate the polarisation vector of the material which has 100 dipoles per unit volume in a volume of 2 units. a) 200 b) 50 c) 400 d) 0.02
Last Answer : a) 200
Description : The best definition of polarisation is a) Orientation of dipoles in random direction b) Electric dipole moment per unit volume c) Orientation of dipole moments d) Change in polarity of every dipole
Last Answer : b) Electric dipole moment per unit volume
Description : Superconductors exhibit which of the following properties? a) Ferromagnetism b) Polarisation c) Diamagnetism d) Ferrimagnetism
Last Answer : c) Diamagnetism
Description : Dipole moments are used to calculate the a) Electric field intensity b) Polarisation patterns c) Strength of the dipole in the field d) Susceptibility
Last Answer : b) Polarisation patterns
Description : Dipoles in any electric field undergo a) Magnetism b) Electromagnetism c) Magnetisation d) Polarisation
Last Answer : d) Polarisation
Description : In free space, the charge carriers will be a) 0 b) 1 c) 100 d) Infinity
Last Answer : a) 0
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 : 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 : 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 : Semiconductors possess which type of bonding? a) Metallic b) Covalent c) Ionic d) Magnetic
Last Answer : b) Covalent
Description : Inductance is present in semiconductor. State True/False. a) True b) False
Last Answer : b) False
Description : Which of the following properties distinguish a material as conductor, insulator and semiconductor? a) Free electron charges b) Fermi level after doping c) Energy band gap d) Electron density
Last Answer : c) Energy band gap
Description : Find the force that exists in an electromagnetic wave. a) Electrostatic force b) Magnetostatic force c) Lorentz force d) Electromotive force
Last Answer : c) Lorentz force
Description : Two charges 1C and -4C exists in air. What is the direction of force? a) Away from 1C b) Away from -4C c) From 1C to -4C d) From -4C to 1C
Last Answer : c) From 1C to -4C
Description : The charge density of a field with a position vector as electric flux density is given by a) 0 b) 1 c) 2 d) 3
Last Answer : d) 3
Description : The sequence for finding E when charge density is given is a) E-D-ρv b) E-B-ρv c) E-H-ρv d) E-V-ρv
Last Answer : a) E-D-ρv
Description : Find the electric flux density of a material whose charge density is given by 12 units in a volume region of 0.5 units. a) 12 b) 24 c) 6 d) 48
Last Answer : c) 6
Description : The charge density of a electrostatic field is given by a) Curl of E b) Divergence of E c) Curl of D d) Divergence of D
Last Answer : d) Divergence of D
Description : Find the charge density when the electric flux density is given by 2x i + 3y j + 4z k. a) 10 b) 9 c) 24 d) 0
Last Answer : b) 9
Description : Find the charge density from the function of flux density given by 12x – 7z. a) 19 b) -5 c) 5 d) -19
Last Answer : c) 5
Description : Find the flux density at the boundary when the charge density is given by 24 units. a) 12 b) 24 c) 48 d) 96
Last Answer : b) 24
Description : Calculate the charge density for the current density given 20sin x i + ycos z j at the origin. a) 20t b) 21t c) 19t d) -20t
Last Answer : b) 21t
Description : . Find the current when the charge is a time function given by q(t) = 3t + t 2 at 2 seconds. a) 3 b) 5 c) 7 d) 9
Last Answer : c) 7
Description : Electric field of an infinitely long conductor of charge density λ, is given by E = λ/(2πεh).aN. State True/False. a) True b) False
Description : Compute the charge enclosed by a cube of 2m each edge centered at the origin and with the edges parallel to the axes. Given D = 10y 3 /3 j. a) 20 b) 70/3 c) 80/3 d) 30
Last Answer : c) 80/3