Q. The duration of sunspot cycle is

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Q. Electromagnetic cavity resonators (energy storage devices) are used in

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Q. Waveguides are generally used above

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Q. Which type of fading causes serious distortion of modulated signal?

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Q. Which of the following is abnormal variation in ionosphere?

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Q. Troposphere is the upper part of the Earth's atmosphere which absorbs large quantities of Sun's radiations.

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Q. For resonant long wire antenna 'n' half wavelength long in free space, if 'n' is increased then inclination of the major lobe with wire axis will __________ .

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Q. The maximum effective aperture of λ/2 (half-wave) antenna is

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Q. Microwave signals follow the curvature of the earth and the phenomenon is known as

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Q. In a carbon-zinc cell the function of the depolarizer is that

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Q. Induction and radiation fields are equal at a distance equal to

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Q. The effective height of an antenna is slightly greater than physical height because

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Q. A long periodic antenna is a

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Q. The wave in wave guide has

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Q. While determining antenna height for terrestrial microwaves links, the effect of refraction from the atmosphere is taken care of by considering the effective curvature of the earth to be

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Q. A T.V. station works at 300 MHz and radiates 100 kW of power. This signal received at a distance of 200 km will be

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Q. The power gain of a half-wave dipole with respect to an isotropic radiator is

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Q. In an impedance smith chart, a clockwise movement along a constant resistance circle gives rise to

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Q. The relative permittivity of the ionosphere at ratio frequencies is

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Q. Tropospheric scatter propagation is not subject to any fading.

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