Q. A transmission line is feeding 1 watt of power to a horn antenna having a gain of 10 dB. The antenna is matched to the transmission line. The total power radiated by the horn antenna into the free space is

View solution

Q. A parallel polarized wave is incident from air into paraffin having relative permittivity 3, the value of its Brewster angle is

View solution

Q. In a conductor which of the following relations hold good?

View solution

Q. The radiation resistance of a λ/16 wire dipole in free space will be nearly

View solution

Q. The phase angle corresponding to λ/4 in a standing-wave pattern is

View solution

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

View solution

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

View solution

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

View solution

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.

View solution

Q. Calculate wave impedance for TE mode

View solution

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

View solution

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

View solution

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)

View solution

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.

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

Q. What is the characteristic impedance at 10 MHz?

View solution