Q. The gain of an half wavelength antenna is

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Q. Which of the following does not characterize a ferromagnetic material?

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Q. Solution of Laplace equations, which are continuous through the second derivative, are called

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Q. The skip distance does not depends upon

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Q. Which one of the following statement is correct?

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Q. Frequency band used for radar is generally

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Q. In case of antenna the lower value of Q indicates

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Q. One volt equals

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Q. Magnetic susceptibility of a medium is the ratio of

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Q. In order to receive a vertically polarized wave, the conductor of the dipole should be mounted

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Q. Which of the following statements is incorrect?

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Q. Reflectors and lens antennas are commonly used

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Q. In a uniform linear array, four isotropic radiating elements are spaced λ/4 apart. The progressive phase shift between the elements required for forming the main beam at 60° off the end fire is

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Q. After reflection from a plane conducting surface, the apparent velocity of electromagnetic wave becomes greater than the velocity of light in free space is called

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Q. In a turnstile antenna the crossed dipoles are excited with voltages

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Q. Directivity of antenna is defined as

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Q. Consider the following; for a loss-less transmission line we can write,

1. Zin = - jz0 for a shorted line with l = λ/8
2. Zin = ± j ∞ for a shorted line with l = λ/4
3. Zin= jz0 for an open line with l = λ/2
4. Zin = 0 for a matched line of any length

Select the correct answer using the codes given below codes.

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Q. Strip lines are used at

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Q. ∇² is

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Q. End fire array has narrow bandwidth.

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