Q. Which one is correct option?

View solution

Q. A vertical loop antenna, like a horizontal dipole, is vertically polarised.

View solution

Q. The attenuation in a waveguide near the cut off frequency is

View solution

Q. The electric flux and field intensity inside a conducting sphere is

View solution

Q. T.V. antennas are usually

View solution

Q. Select the correct relation

View solution

Q. Diffraction of electromagnetic wave

View solution

Q. Power gain of antenna equals directive gain in VHF and UHF range if and only if efficiency of the antenna is

View solution

Q. For a plane good conductor, skin depth varies

View solution

Q. Measurement of radiation resistance by reflection method is suitable for

View solution

Q. A loss less transmission line is terminated in a load which reflects a part of the incident power. The measured VSWR is 2. The percentage of the power that is reflected back is

View solution

Q. A higher directivity is specified by

View solution

Q. The best excited reflector from a wave guide is

View solution

Q. Consider an arbitrary distribution of conducting bodies in a charge free space according to the uniqueness theorem, which of following are required to be specified in order that the field is uniquely determined everywhere?

1. Total charge on each conductor
2. Potential at each conductor surface
3. Potential at same of conductor and total charge on the remainder
4. Total charge as well as potential gradient on each conductor surface

Select the correct answer using the codes given below codes

View solution

Q. Which of the following is a better propagation mode to propagate television frequency modulation and radar signals?

View solution

Q. Antenna used for T.V. broadcasting is

View solution

Q. For a rectangular waveguide (a x b, a > b) to support only the TE₁₀ mode at wavelength which one of the following pairs of in equalities is to be satisfied?

View solution

Q. For an elliptically polarized wave incident on the interface of a dielectric at the Brewster angle the reflected wave will be

View solution

Q. Which of the antenna is best excited by a waveguide?

View solution

Q. An end fire array consisting of several half-wave lengths of directive gain 40, then array length will be

View solution