Q. Two identical antennas are placed in the θ = π/2 plane as shown in the figure. The elements have equal amplitude excitation with 180° polarity difference, operating of the far-zone resultant electric field strength normalized with that of a single element, both computed for φ = 0, is

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Q. For static magnetic field Maxwell's curl equation is given by

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Q. Two identical and parallel dipole antenna are kept apart by a distance of λ/4 in the H-plane. They are fed with equal currents but the right most antenna has a phase shift of + 90°. The radiation pattern is given as

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Q. Which one of the following statement is not a correct for a plane wave with

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Q. For a transmission line with homogeneous dielectric the capacitance per unit length is 'c', the relative permittivity of the dielectric is 'εr' and velocity of light in free space is 'v' the characteristic impedance z0 is equal to

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Q. If the electric field intensity is given by following equation, the potential difference between x(2, 0, 0) and y(1, 2, 3) is

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Q. Medium 1 has the electrical permittivity ε1 = 1.5 ε0 farad/m and occupies the region to the left of x = 0 plane. Medium 2 has the electrical permittivity ε2 = 2.5 ε0 farad/m and the occupies the region to the right of x = 0 plane. If E1 in medium 1 is given by below equation, then E2 in medium 2 is

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Q. Find the flux crossing the plane surface defined by 0.5 ≤ r ≤ 3.5 m and 0 ≤ z ≤ 3 m. if

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Q. The sinusoidally time varying vector field is

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Q. Which of the following relations is valid?

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Q. The directive gain of an antenna is given by

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Q. Which of the following relations is correct?

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Q. In case of static electric field Maxwell's divergence equation states that:

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Q. Voltage standing wave pattern in a loss less transmission line with characteristic impedance 50 Ω and a resistive load is shown in the figure. The value of load resistance is

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Q. In figure the voltage distribution on a vertical earthed antenna is represented by

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Q. For a good conducting medium the intrinsic impedance is

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Q. Given figure shows a 90° sector of spherical reflector with vertex 'V', centre of curvature 'C' and equal distances VD, DF, FE and EC. When a beam of EM wave is incident parallel to the axis, all the energy will pass through the region

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Q. Two co-axial cylindrical sheets of charge are present in free space fs = 5 c/m² at r = 2 m and ρs = -2 c/m² at r = 4 m, The displacement flux density D at r = 3 m is

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Q. For space propagation, what will be the electric field strength at receiving antenna

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Q. In a vertical earthed antenna the base input impedance will be inductive for a height

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