Q. The best excited reflector from a wave guide is

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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

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

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Q. Antenna used for T.V. broadcasting is

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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?

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

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

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

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Q. Loop antennas are mostly employed for direction finding (DF) purposes because they are small and hence portable.

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Q. MF is generally used for

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Q. The attenuation in waveguides near the cut off frequency is

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Q. The ground waves eventually disappear as one moves away from the transmitter because of

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Q. The radiation resistance of a rod tubing antenna is

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Q. Power gain of an antenna in a given direction is the ratio of

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Q. The curve representing Ohm's law is

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Q. When a plane wave is incident normally from dielectric '1' (μ₀, ε1) onto dielectric '2' (μ₀, ε2) the electric field of the transmitted wave is 2 times the electric field of the reflected wave. The ratio ε2/ε1 is

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Q. The electric intensity for free space is given by

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Q. Which of following antenna not produces circular polarisation?

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Q. Purpose of antenna is

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Q. End fire coupler is formed

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