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

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
by

1 Answer

Answer :

c) Circularly polarised
by

Related questions

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

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

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

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

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

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

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

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

A circularly polarised wave transmitted at the Brewster angle will be received as linearly polarised wave. State True/False a) True 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

Last Answer : a) True

An elliptically polarised wave transmitted at the Brewster angle will be received as an elliptically polarised wave. 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

The Brewster angle is valid for which type of polarisation? a) S polarised b) P polarised c) Elliptical d) Linear

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

Brewster angle is valid for which type of polarisation? a) Perpendicular b) Parallel c) S polarised d) P polarised

Description : Brewster angle is valid for which type of polarisation? a) Perpendicular b) Parallel c) S polarised d) P polarised

Last Answer : b) Parallel

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

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

An electromagnetic wave is ________ polarized when the electric field lies wholly in one plane containing the direction of propagation. A. Horizontally B. Linearly C. Circularly D. Vertically

Description : An electromagnetic wave is ________ polarized when the electric field lies wholly in one plane containing the direction of propagation. A. Horizontally B. Linearly C. Circularly D. Vertically

Last Answer : B. Linearly

Pick up the correct statement from the following: (A) When the electric field oscillates in the direction of the electric vector, a plane polarised wave is formed (B) When the electric vector is in the plane of incidence, vertical polarisation is formed (C) When the electric vector is at right angles to the plane of incidence, horizontal polarization wave is formed (D) All of these

Description : Pick up the correct statement from the following: (A) When the electric field oscillates in the direction of the electric vector, a plane polarised wave is formed (B) When the electric vector is ... right angles to the plane of incidence, horizontal polarization wave is formed (D) All of these

Last Answer : Answer: Option D

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

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

Identify the polarisation of the wave given that, Ex = 2 cos wt and Ey = cos wt. a) Elliptical b) Circular c) Parallel d) 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

When the Ex and Ey components of a wave are not same, the polarisation will be a) Linear b) Elliptical c) Circular d) 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

The transmission coefficient of a wave with incident and transmitted electric field of 5 and 5 respectively is a) 0 b) 1 c) 10 d) 5

Description : The transmission coefficient of a wave with incident and transmitted electric field of 5 and 5 respectively is a) 0 b) 1 c) 10 d) 5

Last Answer : b) 1

The angle at which the wave must be transmitted in air media if the angle of reflection is 45 degree is a) 45 b) 30 c) 60 d) 90

Description : The angle at which the wave must be transmitted in air media if the angle of reflection is 45 degree is a) 45 b) 30 c) 60 d) 90

Last Answer : a) 45

Find the Brewster angle of a wave transmitted from a medium of permittivity 4 to a medium of permittivity 2. a) 35.26 b) 53.62 c) 26.35 d) 62.53

Description : Find the Brewster angle of a wave transmitted from a medium of permittivity 4 to a medium of permittivity 2. a) 35.26 b) 53.62 c) 26.35 d) 62.53

Last Answer : a) 35.26

The reflection coefficient in the wave propagation when it is transmitted with the Brewster angle is a) 0 b) 1 c) -1 d) Infinity

Description : The reflection coefficient in the wave propagation when it is transmitted with the Brewster angle is a) 0 b) 1 c) -1 d) Infinity

Last Answer : a) 0

In P polarisation, the electric field lies in the same plane as the interface. 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

Last Answer : a) True

In S polarisation, the electric field lies in the plane perpendicular to that of 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

Last Answer : a) True

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 Snell law is applicable for perpendicular polarisation and the Brewster law is applicable for parallel polarisation. State True/False. a) True b) False

Last Answer : a) True

For a non-zero Ex component and zero Ey component, the polarisation is a) Parallel b) Perpendicular c) Elliptical d) Circular

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

The magnitude of the Ex and Ey components are same in which type of polarisation? a) Linear b) Circular c) Elliptical d) Perpendicular

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

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

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

The charge build up in a capacitor is due to a) Conduction current density b) Displacement current density c) Polarisation d) Magnetization

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

When a dielectric loses its dielectric property, the phenomenon is called a) Dielectric loss b) Dielectric breakdown c) Polarisation d) Magnetization

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

Solids do not have which type of polarisation? a) Ionic b) Orientational c) Interfacial d) Electronic

Description : Solids do not have which type of polarisation? a) Ionic b) Orientational c) Interfacial d) Electronic

Last Answer : c) Interfacial

In the given types of polarisation, which type exists in the semiconductor? a) Electronic b) Ionic c) Orientational d) Interfacial or space charge

Description : In the given types of polarisation, which type exists in the semiconductor? a) Electronic b) Ionic c) Orientational d) Interfacial or space charge

Last Answer : d) Interfacial or space charge

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

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

In isotropic materials, which of the following quantities will be independent of the direction? a) Permittivity b) Permeability c) Polarisation d) Polarizability

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

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

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

Identify which type of polarisation depends on temperature. a) Electronic b) Ionic c) Orientational d) Interfacial

Description : Identify which type of polarisation depends on temperature. a) Electronic b) Ionic c) Orientational d) Interfacial

Last Answer : c) Orientational

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

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

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

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

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

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

Superconductors exhibit which of the following properties? a) Ferromagnetism b) Polarisation c) Diamagnetism d) Ferrimagnetism

Description : Superconductors exhibit which of the following properties? a) Ferromagnetism b) Polarisation c) Diamagnetism d) Ferrimagnetism

Last Answer : c) Diamagnetism

Dipole moments are used to calculate the a) Electric field intensity b) Polarisation patterns c) Strength of the dipole in the field d) Susceptibility

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

Dipoles in any electric field undergo a) Magnetism b) Electromagnetism c) Magnetisation d) Polarisation

Description : Dipoles in any electric field undergo a) Magnetism b) Electromagnetism c) Magnetisation d) Polarisation

Last Answer : d) Polarisation

The antenna radiates _____ polarized waves when the transmitter antenna is horizontally installed. A. Vertically B. negatively C. horizontally D. circularly

Description : The antenna radiates _____ polarized waves when the transmitter antenna is horizontally installed. A. Vertically B. negatively C. horizontally D. circularly

Last Answer : C. horizontally

A horizontal antenna is _____. A. vertically polarized B. horizontally polarized C. centrally polarized D. circularly polarized

Description : A horizontal antenna is _____. A. vertically polarized B. horizontally polarized C. centrally polarized D. circularly polarized

Last Answer : B. horizontally polarized

ECE Board Exam March 1996 An antenna that is circularly polarized is the ____________. A. parabolic reflector B. helical C. Yagi-uda D. small circular loop

Description : ECE Board Exam March 1996 An antenna that is circularly polarized is the ____________. A. parabolic reflector B. helical C. Yagi-uda D. small circular loop

Last Answer : B. helical

Consider the following statements: 1. Tamil Nadu is the only area which receives about half of its rainfall from north-east monsoon winds. 2. Kerala is the only state receiving very heavy rainfall from the south-west monsoon winds. 3. In India, the south-west monsoon is stronger than the north-east monsoon. Which of these are correct statements? [NDA 2001] (a) 1, 2 and 3 (b) 1 and 2 (c) 1 and 3 (d) 2 and 3

Description : Consider the following statements: 1. Tamil Nadu is the only area which receives about half of its rainfall from north-east monsoon winds. 2. Kerala is the only state receiving very heavy rainfall from the south-west monsoon winds. 3. In India ... ] (a) 1, 2 and 3 (b) 1 and 2 (c) 1 and 3 (d) 2 and 3

Last Answer : Ans: (a)

An elliptically (arbitrarily polarized wave c an be broken up into

Description : An elliptically (arbitrarily polarized wave c an be broken up into  a) Two circularly polarized components rotating in same direction b) Two circularly polarized components rotating in opposite directions c) Two stationary circularly polarized components d) None of these

Last Answer : An elliptically (arbitrarily polarized wave c an be broken up into Two circularly polarized components rotating in opposite directions 

For a space wave transmission, the radio horizon distance of a receiving antenna with a height of 64 meters is approximately A. 8 km B. 32 km C. 64 km D. 256 km

Description : For a space wave transmission, the radio horizon distance of a receiving antenna with a height of 64 meters is approximately A. 8 km B. 32 km C. 64 km D. 256 km

Last Answer : B. 32 km

What is the resultant field strength at the receiving antenna in space wave propagation under case 2? A. 0 B. ξd C. 2ξd D. 3ξd

Description : What is the resultant field strength at the receiving antenna in space wave propagation under case 2? A. 0 B. ξd C. 2ξd D. 3ξd

Last Answer : C. 2ξd

A receiver is located 64 km from a space wave transmitting antenna that is 100 meters high. Find the required height of the receiving antenna. A. 36 meters high B. 64 meters high C. 100 meters high D. 182.25 meters high

Description : A receiver is located 64 km from a space wave transmitting antenna that is 100 meters high. Find the required height of the receiving antenna. A. 36 meters high B. 64 meters high C. 100 meters high D. 182.25 meters high

Last Answer : A. 36 meters high

If a transmitting antenna is 100 meters high and a separate receiving antenna is 64 meters high, what is the maximum space wave communication distance possible between them? A. 18 km B. 72 km C. 164 km D. 656 km

Description : If a transmitting antenna is 100 meters high and a separate receiving antenna is 64 meters high, what is the maximum space wave communication distance possible between them? A. 18 km B. 72 km C. 164 km D. 656 km

Last Answer : B. 72 km

The maximum power transceived by the antenna is in the region of a) Aperture b) Effective aperture c) Maxima lobe d) Minima lobe

Description : The maximum power transceived by the antenna is in the region of a) Aperture b) Effective aperture c) Maxima lobe d) Minima lobe

Last Answer : b) Effective aperture

Radio wave concentration in the direction of the signal emitted by a directional antenna. A. Back lobe radiation B. Side lobe radiation C. Major lobe radiation D. Transmitted signal

Description : Radio wave concentration in the direction of the signal emitted by a directional antenna. A. Back lobe radiation B. Side lobe radiation C. Major lobe radiation D. Transmitted signal

Last Answer : C. Major lobe radiation

The power of a wave in a cylindrical waveguide of radius 2m with electric field 12 units is a) 2.39 b) 3.92 c) 9.23 d) 9.32

Description : The power of a wave in a cylindrical waveguide of radius 2m with electric field 12 units is a) 2.39 b) 3.92 c) 9.23 d) 9.32

Last Answer : a) 2.39