Q. During day time ionosphere consist of

View solution

Q. To couple a coaxial line to a parallel wire line, it is best to use a

View solution

Q. Which of the following is λ/2 length?

View solution

Q. Which of the following is the main difference between waveguide and transmission line?

View solution

Q. Television signals are propagated as ground waves.

View solution

Q. The characteristic impedance of loss less transmission line is

View solution

Q. For a hollow waveguide, the axial current must necessarily be

View solution

Q. Industrial heating furnaces such as arc and induction furnaces operate on __________ power factor

View solution

Q. In order to receive a vertical polarized wave, the conductor of the dipole should be mounted

View solution

Q. VSWR can have any value between

View solution

Q. The input impedance for folded dipole antenna (two half dipole) is

View solution

Q. Capacitance hats are installed on low frequency antenna is

View solution

Q. Surface impedance at high frequencies is a consideration for

View solution

Q. In a uniform plane wave E and H are related by

View solution

Q. Antenna beamwidth is

View solution

Q. The pure capacitor connected across an A.C. voltage consumed 20 W. This is due to

View solution

Q. A dominant wave is characterised by which of the following?

View solution

Q. The cut off wavelength λc for TE₂₀ mode for a standard rectangles waveguide is

View solution

Q. F2 layer of atmosphere extends from

View solution

Q. Whereas resonant antenna is bidirectional, non-resonant antenna is unidirectional.

View solution