Q. Assertion (A): A coaxial line is a non-radiating line.

Reason (R): In a coaxial line the electric and magnetic fields are confined to the region between the concentric conductors.

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Q. Reflex klystron oscillator is essentially a low power device

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Q. A 10 km long line has a characteristic impedance of 400 ohms. If line length is 100 km, the characteristic impedance is

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Q. A matched generator (Zg = Z0) with 1 Ω available. If all ports are matched, the power delivered at ports 1, 2, 3 respectively are

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Q. Which TM mode in rectangular waveguide has lowest cutoff frequency?

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Q. The velocity factor of a transmission line depends on

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Q. A loss less line of characteristic impedance Z₀ is terminated in pure reactance of -jZ₀ value. VSWR is

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Q. In a klystron amplifier the input cavity is called

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Q. In a circular waveguide the dominant mode is

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Q. The reflection coefficient on a line is 0.2 ∠45°. The SWR is

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Q. For a 50 Ω resistor for 3 GHz application, the stray capacitance should be less than

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Q. In a travelling wave tube distributed interaction between an electron beam and a travelling wave takes place

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Q. The fabrication of microstrip line is done by

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Q. The condition of minimum distortion in a transmission line is

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Q. A resistive microwave load with ZL = 150 Ω is connected to 50 Ω coaxial line. SWR is

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Q. Which of the following devices uses a slow wave structure?

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Q. In a turnstile antenna two-half wave resonant wire radiators are placed at 90° to each other in the same plane and are excited

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Q. A waveguide section in a microwave circuit acts as

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Q. In a klystron amplifier dc electron velocity is v₀ and dc electron charge density is ρ₀ the dc beam current is

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Q. Which of the following parameters is negligible in transmission lines?

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