Q. A hollow rectangular waveguide has dimensions a = 2b. Calculate the amount of attenuation, if the frequency is 3 GHz, and b = 1 cm.

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Q. Calculate the directivity of an antenna for θE = 30°, θH = 60

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Q. Which one of the following potential does not satisfy Laplace's equations?

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Q. A rectangular waveguide measures 3 x 4.5 cm internally and has a 10 GHz signal propagated in it. Calculate the wave impedance for dominant mode.

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Q. Calculate wave impedance for TE mode

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Q. In a 100 turn coil, if the flux through each turn is (t³ - 2t)mWb, the magnitude of the induced emf in the coil at a time of 4 sec is

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Q. A (75 - j 40) W load is connected to a co-axial line of z0 = 75ω at 6 MHz. The load matching on the line can be accomplished by connecting

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Q. The electric field on the surface of a perfect conductor is 2V/m. The conductor is immersed in water with ε = 80 ε0. The surface charge density on the conductor is ((ε0 = 10¯⁹/36π)F/m)

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Q. A wave is propagated in a waveguide at frequency of 9 GHz and separation is 2 cm between walls calculate the phase velocity for dominant mode.

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Q. A plane electromagnetic wave travels in dielectric medium of relative permittivity 9. Relative to free space, the velocity of propagation in the dielectric is

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Q. Calculate the wave impedance for TM mode in rectangular waveguide for dominant mode at 3 GHz having

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Q. The divergence of the electric field intensity at any point equals

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Q. For a 400 kHz transmission line having L = 0.5 mH/km, C = 0.08 mF and negligible R and G, the value of propagation constant P will be

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Q. The Depth of penetration of EM wave in medium having conductivity σ at a frequency of 1 MHz is 25 cm. The depth of penetration at a frequency of 4 MHz will be

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Q. What is the characteristic impedance at 10 MHz?

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Q. The input impedance of short-circuited line of length l where λ/4 < l < λ/2, is

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Q. A wave is propagated in a waveguide at frequency of 9 GHz and separation is 2 cm between walls find cut off wavelength for dominant mode.

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Q. Find the radiation resistance of an antenna of length λ/10 meter?

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Q. A rectangular metal waveguide filled with a dielectric of relative permittivity εr = 4, has the inside dimensions 3 x 1.2 cm, the cut off frequency for the dominant mode is

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Q. ZL = 200 Ω and it is desired that Zi = 50 Ω The quarter wave transformer should have a characteristic impedance of

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