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

Q. The radiation pattern of two element collinear array is represent in

View solution

Q. A lossless transmission line is connected to two identical voltage source as shown in figure. The impedance measured at the midpoint AA' is

View solution

Q. For a quarter wave transformer, characteristic impedance is related with input and load impedances as

View solution

Q. What does the following expression represent?

View solution

Q. For radiation field of an antenna at a distance r varies as

View solution

Q. The attenuation factor α and phase shift factor β for a wave propagated in a good dielectric having σ/ωε >> 1 are given by

View solution