Q. Maximum effective aperture of a λ/2 antenna is

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Q. Which of the following wave remains unaffected during day and night?

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Q. A microwave link uses only line-of-sight propagation.

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Q. The phase velocity of an EM wave propagating in a hollow metallic rectangular waveguide in the TE10 mode is

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Q. Which of the following laws of electromagnetic theory is associated with the force experienced by two loops of a wire carrying currents?

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Q. The intrinsic impedance of free space

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Q. To couple a coaxial line to a parallel to wire line it is best to use a

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Q. The shunt admittance of a transmission line is given by

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Q. A dipole antenna was radiating with some excitation in free space radiating a certain amount of the power. If this antenna is immersed in a lake where water is non-dissipative but has a dielectric constant of 81, the radiated power with the same excitation will

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Q. The effective refraction index of the ionosphere for radio wave is

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Q. A medium is said to be isotropic when

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Q. The radiation resistance of a resonant long wire antenna of half wavelength (λ/2) is given

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Q. A uniform wave have components

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Q. The direction in a Yagi Uda antenna

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Q. In cell phone antennas are

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Q. Antenna commonly used for microwave links are

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Q. If short-circuited and open circuited impedances are 5 ohms and 20 ohms, then characteristic impedance is

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Q. Electric lines of force do not cross each other because

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Q. A person with a receiver is 5 km away from the transmitter. What is the distance that this person must move further to detect at 3 dB decrease in signal strength?

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Q. For free space propagation

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