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May 3, 2024May 3, 2024 /24 EMTL Test 1 EMTL Test 1 1 / 24 Isolated electric charge ________, Isolated magnetic charge ______________ exists, doesn't exists exists, exists doesn't exists, exists doesn't exists, doesn't exists 2 / 24 A transmission line having a characteristic impedance of 100 ohms & is terminated by a load of 200 ohms. Calculate the line impedance and reflection coefficient at load end 50, 0.5 50, 0.33 100, 0.5 150, 0.5 3 / 24 For TV broadcasting, _________ polarization is preferred Linear Circular Elliptical Any of the above 4 / 24 In a square waveguide, dominant mode is TE00 TE01 TE10 TE01 or TE10 5 / 24 Calculate the operating frequency of a rectangular waveguide in TE11 having a dimensions of 2*3 8.8GHz 8.9GHz 9GHz 9.1GHz 6 / 24 If SWR = 5, reflection co-efficient = ____________ 0.68 0.66 0.7 0.64 7 / 24 Identify the dominant mode in the case of Rectangular resonant cavity TM110 TE110 TE100 TM111 8 / 24 Law of conservation of energy: Gauss law Faraday's law Continuity eqn Newton's law 9 / 24 Moving in clockwise on constant resistance circle, Inductive reactance __________ & capacitive reactance _________________ Increases, Increases Increases, decreases Decreases, Increases Decreases, Decreases 10 / 24 Identify the dominant mode in the case of Rectangular resonant cavity TE110 TE111 TE101 TM111 11 / 24 For an Hertzian dipole, what is the condition on "L" and "Î»" L = Î» L is less than Î» L is greater than Î» Relation doesn't exists 12 / 24 Transmission line is distortionless if RL = 1/ (GC) RL = GC RC = LG RG = LC 13 / 24 Average power = sqrt(Emax, Hmax) sqrt(0.5(Emax, Hmax)) 0.5(Emax, Hmax) 0.25(Emax, Hmax) 14 / 24 static electric field and magnetic field is ________ & __________ conservative & irrotational non-conservative and rotational Conservative and Rotational Rotational & Conservative 15 / 24 What is the separation b/w maxima and minima Î»/2 Î» Î»/4 Î»/8 16 / 24 For calculating, antennas efficiency, reference antenna is Omni-Directional antenna Directional antenna Isotropic antenna Helical antenna 17 / 24 If E = (x+jy)e^(j[wt-Bz]) Linear polarization left circular polarization Right circular polarization left elliptical polarization 18 / 24 The depth of penetration of a wave in a lossy dielectric increases with increasing conductivity Permitivity wavelength Permeability 19 / 24 Calculate the SWR, when the EM wave in free space incident normally on a perfect dielectric slab & measured Emax=25V/m, Emin = 14V/m. 1.5 1.6 1.7 1.8 20 / 24 successive minima or successive maxima differs by a length of Î»/8 Î»/4 Î»/2 Î» 21 / 24 Calculate the value of intrinsic impedance, given conductivity of sea water = 4, operating frequency is 60Hz, Relative permitivity = 80 0.05 0.1 0.01 0.15 22 / 24 Copper behaves as Conductor always conductor or dielectric depending on electric field strength conductor or dielectric depending on frequency applied conductor or dielectric depending on electric current density 23 / 24 For transferring maximum power in Tx line, load end is always made ___________ Matched Mismatched Doesn't matter 100 ohms 24 / 24 In conducting medium, Î² is _______ function of frequency Independent Linear Summative Non-linear Your score isThe average score is 38% 0% Restart quiz