Test: Electromagnetic Field Theory - 7 - Electronics and Communication Engineering (ECE) MCQ

Power gain and directivity related with, G_p power gain, G_d directive gain

Radiation intensity in a given direction is the

The capacitance between two spheres, whose separation is very much larger than their radii R, is given approximately as

If ωε is the displacement current factor and s is conduction current density factor then which of the following statements is incorrect?

Parabolic and lens antenna used at

Which of the following statement regarding waveguides is incorrect?

The potential that appears at a point in space due to the current which caused it is called potential

It is desired to reduce the reflection at an air porcelain by use of 7/4 plate (for Porcelain μ = 40, and ε_r = 7). The thickness of the polystyrene plate required at 10 GHz will be

Which of the following statement is false?

The useful magnetic flux obtainable from any closed surface is

The voltage and current distributions on a grounded λ/4 dipole (Marconi antenna) are similar to those of a half wave dipole in space.

The equation ∇ . J = 0 is called

It is best to use for coupling a coaxial line to a parallel wire transmission line.

In H-plane metal plate lens the travelling wave front is

MUF is depend upon

In case of antenna the ratio of the power radiated in the desired direction to the power radiated in the opposite direction is known as

Which of the following is not between F₂ layer and D layer?

The radiation pattern of Hertzian dipole in the plane perpendicular to dipole is a

The transmitting antennas for lower frequencies (below 500 kHz) are generally

In an home T.V. receiver, the leed in from the antenna is

A satellite that simply reflect back the signals from one region of the earth to the other region is known as

Conductivity is measured in terms of