Q. Assertion (A): In TE mode for rectangular waveguide.

Reason (R): In TM mode for rectangular waveguide.

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Q. The attenuation characteristics of a loaded line is similar to that of

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Q. A microstrip line has ∈r = 9. The normalised wavelength (λ/λ₀) is about

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Q. If the repeller voltage in a klystron oscillator is increased the transit time of electron

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Q. When duct propagation exists

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Q. If in line G/C = R/L, the characteristic impedance becomes real.

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Q. In a microwave coaxial cable the inner conductor radius is a and inner radius of outside conductor is b. For TE₁₁ mode the cut off wavelength is about

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Q. The rotation of direction of E field of a linearly polarized wave passing through a magnetised ferric medium is called

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Q. If air pressure in a rectangular waveguide is increased the maximum power handling capacity

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Q. A directional coupler is used to determine

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Q. For air filled circular waveguides

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Q. A short circuited stub is preferred to an open circuited stub because an open circuited stub

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Q. If the peak transmitted power in a radar is increased by a factor 81, the maximum range is increased by a factor of

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Q. Radar is essentially an echo ranging system

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Q. In Gunn diode electrons are transferred from

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Q. Consider the following statements about radar Beacon

1. It is also called transponder.
2. It includes pulse transmitter, receiver and antenna.
3. It replies with full power even when the signal receives is weak.

Which of the above statements are correct?

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Q. Consider the following statements about instrument landing system of aircraft

1. It ensures correct landing under conditions of low visibility.
2. It consists of runaway localizer, glide path equipment and marker beacons.
3. It is basically a blind landing system.

Which of above statements are correct?

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Q. Effect of loading of line is

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Q. Which mode has the minimum cutoff frequency in rectangular wave guides?

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Q. As compared to dimensions of most feeds, the skin depth at microwave frequencies is

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