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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

Q. The sinusoidally time varying vector field is

View solution

Q. Which of the following relations is valid?

View solution

Q. The directive gain of an antenna is given by

View solution

Q. Which of the following relations is correct?

View solution

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

View solution

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

View solution

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

View solution

Q. For a good conducting medium the intrinsic impedance is

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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. Reflection coefficient is given by

View solution

Q. The electric field of an EM wave propagating in the z direction given by following equation. The wave is

View solution