Description : The standing wave ratio of short circuited and open circuited lines will be a) 0 b) 1 c) -1 d) ∞
Last Answer : d) ∞
Description : For matched line, the standing wave ratio will be a) 0 b) ∞ c) -1 d) 1
Last Answer : d) 1
Description : Find the standing wave ratio, when a load impedance of 250 ohm is connected to a 75 ohm line. a) 0.3 b) 75 c) 250 d) 3.33
Last Answer : d) 3.33
Description : The maxima and minima voltage of the standing wave are 6 and 2 respectively. The standing wave ratio is a) 2 b) 3 c) 1/2 d) 4
Last Answer : b) 3
Description : Standing wave ratio is defined as the a) Ratio of voltage maxima to voltage minima b) Ratio of current maxima to current minima c) Product of voltage maxima and voltage minima d) Product of current maxima and current minima
Last Answer : a) Ratio of voltage maxima to voltage minima
Description : The attenuation constant in lossless dielectrics will be a) 0 b) 1 c) -1 d) ∞
Last Answer : a) 0
Description : At dc field, the displacement current density will be a) 0 b) 1 c) Jc d) ∞
Description : Find the magnetic flux density when the vector potential is a position vector. a) 1 b) 0 c) -1 d) ∞
Last Answer : b) 0
Description : The divergence of H will be a) 1 b) -1 c) ∞ d) 0
Last Answer : d) 0
Description : When the rotational path of the magnetic field intensity is zero, then the current in the path will be a) 1 b) 0 c) ∞ d) 0.5
Description : Find the magnetic field when a circular conductor of very high radius is subjected to a current of 12A and the point P is at the centre of the conductor. a) 1 b) ∞ c) 0 d) -∞
Last Answer : c) 0
Description : The charge within a conductor will be a) 1 b) -1 c) 0 d) ∞
Description : The susceptibility of free space is a) 1 b) 0 c) 2 d) ∞
Description : The potential due to the dipole on the midpoint of the two charges will be a) 0 b) Unity c) ∞ d) -∞
Description : Find the potential due the dipole when the angle subtended by the two charges at the point P is perpendicular. a) 0 b) Unity c) ∞ d) -∞
Description : If two functions A and B are discrete, their Green’s value for a region of circle of radius a in the positive quadrant is a) ∞ b) -∞ c) 0 d) Does not exist
Last Answer : d) Does not exist
Description : The potential in a lamellar field is a) 1 b) 0 c) -1 d) ∞
Description : When a material has zero permittivity, the maximum potential that it can possess is a) ∞ b) -∞ c) Unity d) Zero
Last Answer : d) Zero
Description : For a test charge placed at infinity, the electric field will be a) Unity b) +∞ c) Zero d) -∞
Last Answer : c) Zero
Description : Calculate the velocity of a wave with frequency 2 x10 9 rad/s and phase constant of 4 x 10 8 units. a) 0.5 b) 5 c) 0.2 d) 2
Last Answer : b) 5
Description : Calculate the phase constant of a wave with frequency 12 rad/s and velocity 3×10 8 m/s(in 10 -8 order) a) 0.5 b) 72 c) 4 d) 3
Last Answer : c) 4
Description : Standing waves occurs due to a) Impedance match b) Impedance mismatch c) Reflection d) Transmission
Last Answer : b) Impedance mismatch
Description : The skin depth of the wave having a frequency of 3MHz and a velocity of 12 m/s is a) 2 b) 3 c) 4 d) 6
Description : Calculate the velocity of wave propagation in a conductor with frequency 5 x 10 8 rad/s and phase constant of 3 x 10 8 units. a) 3/5 b) 15 c) 5/3 d) 8
Last Answer : c) 5/3
Description : Calculate the skin depth of a conductor, having a conductivity of 200 units. The wave frequency is 10 GHz in air. a) 355.8 b) 3.558 c) 35.58 d) 0.3558
Last Answer : a) 355.8
Description : Find the reflection coefficient of the wave with SWR of 3.5. a) 0.55 b) 0.23 c) 0.48 d) 0.68
Last Answer : a) 0.55
Description : Calculate the transmission coefficient of a wave with a reflection coefficient of 0.6 a) 0.6 b) 1 c) 0 d) 0.4
Last Answer : d) 0.4
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
Description : Find the reflection coefficient of a wave with an incident electric field of 5 units and reflected electric field of 2 units. a) 2.5 b) 0.4 c) 0.8 d) 1.2
Last Answer : b) 0.4
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 transmission coefficient of a wave propagating in 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
Description : The power in a wave given that H component is 0.82 units in air. a) 126.74 b) 621.47 c) 216.47 d) 745.62
Last Answer : a) 126.74
Description : The power of a wave with electric field intensity of 3 units in air is a) 0.01 b) 0.03 c) 0.05 d) 0.07
Last Answer : a) 0.01
Description : The total power of a wave with average power 15 units in a surface density of 0.5 units is a) 15 b) 30 c) 7.5 d) 0.75
Last Answer : c) 7.5
Description : The phase constant of a wave with wavelength 2 units is a) 6.28 b) 3.14 c) 0.5 d) 2
Last Answer : b) 3.14
Description : The frequency in rad/sec of a wave with velocity of that of light and phase constant of 20 units is (in GHz) a) 6 b) 60 c) 600 d) 0.6
Last Answer : a) 6
Description : Calculate the wavelength of the wave with phase constant of 3.14 units. a) 1 b) 2 c) 0.5 d) 4
Last Answer : b) 2
Description : Find the range of band gap energy for conductors. a) >6 eV b) 0.2-0.4 eV c) 0.4-2 eV d) 2-6 eV
Last Answer : b) 0.2-0.4 eV
Description : The skin depth is calculated from the amplitude of the wave. State true/false a) True b) False
Last Answer : a) True
Description : The phase constant of a wave propagation with frequency of 35 radian/sec and time delay of 7.5 sec is a) 4.66 b) 262.5 c) 46.6 d) 26.25
Last Answer : b) 262.5
Description : The group delay of a wave with phase constant 2.5 units and frequency of 1.2 radian/sec is a) 3.7 b) 1.3 c) 3 d) 2.08
Last Answer : d) 2.08
Description : The resultant electric field of a wave with Ex = 3 and Ey = 4 will be a) 7 b) 1 c) 25 d) 5
Last Answer : d) 5
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 : 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 : 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 : 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