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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Q. Surface impedance at high frequencies is a consideration for

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Q. The unit of displacement density is

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Q. Dish antennas are

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Q. Long distance short-wave radio broadcasting uses

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Q. The affect of ground on radiation pattern is to

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Q. If a electromagnetic signal is incident at 0° in a waveguide then at other port of waveguide we will get

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Q. An antenna having a high Q has

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Q. The polarization of dielectric materials results in

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Q. An electron when placed midway between two equal and opposite charges will

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Q. Which of the following is the abnormal phenomena observed in the ionosphere?

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Q. In a loss-less transmission line

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Q. Which layer is least important in high frequency propagation?

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Q. Distances near the skip distance should be used for sky-wave propagation

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Q. End fire array has a dipole spacing of λ/2.

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Q. Which one of following is correct for broadside array?

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Q. The effective length of an antenna (Le) is

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Q. Curl of gradient A is

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Q. When microwave signals follow the curvature of the earth, this is known as

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