Q. Which of the following is best excited from a waveguide?

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Q. The frequencies in ultra high frequency range are propagated by means of __________ waves

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Q. For an ideal antenna, numerical value of directivity must be

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Q. The force in a magnetic field is given by F = qvB

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Q. An electromagnetic wave is incident normally on a dielectric boundary. It is

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Q. According to maximum power transfer theorem, if the load is inductive, the source should be

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Q. According to Siegel and Labus, antenna can be treated as

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Q. Which of the following waves do not exist in waveguides?

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Q. The bidirectional pattern of a broadside array can be converted into unidirectional by

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Q. VLF waves are used for communication system because

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Q. The value of susceptibility in case of vacuum is taken as

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Q. Self impedance is

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Q. Equipotential surfaces about a point charge are in which one of the following forms?

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Q. __________ will have the least value of relative permeability.

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Q. A conductor is said to be perfect if it has __________ conductivity

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Q. The simplest standing wave is due to the value of reflection co-efficient is

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Q. In terrestrial microwave links, the number of 'fades' per unit increases as

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Q. Bandwidth of an antenna is related with where Q is quality factor

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Q. When a plane wave travelling in free space is incident normally on a medium having εr = 4.0, then fraction of power transmitted into the medium is given by

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Q. For broadside array, maxima will be obtain at

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