Q221
Open questionWhich one of the following statements does not pertain to the equation?
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ECE · all questionsElectromagnetic Field Theory
Electromagnetic Field Theory
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Q222
Open questionThe magnitude of reflection coefficient is:
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Q223
Open questionA 75 ohm transmission line is to be terminated in two resistive loads R1 and R2 such that the standing patterns in the two cases have the same SWR. To obtain the desired result, the values of R1 and R2 (in ohms) should be
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Q224
Open questionTwo lossy lines are to be joined end to end. The first line is 10 m long and has a loss rating of 0.20 dB/m. The second lines is 15 m long and has a loss rating of 0.10 dB/m. The reflection coefficient at the junction (line 1 to line 2) is Γ = 0.30. The input power (to line 1) is 100 mW. Determine the total loss of the combination in dB to the output end of line 2.
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Q225
Open questionThe potential (scalar) distribution is given as V = 10y4 + 20x3. If ε0 is the permittivity of free space, what is the charge density ρ at the point (2, 0)?
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Q226
Open questionA plane wave propagating in the dielectric medium has an electric field given as Ex = E0 Cos(2.6 × 1010t - 100z). The phase velocity of plane wave is:
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Q227
Open questionGiven potential V = 2x2y + z2, then the electric field at (1, 1, 0) is
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Q228
Open questionMaxwell's major contribution to EM theory was to assert
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Q229
Open questionConsider the following statement about a transmission line having non-zero Parameters R, L, G and C:
1. By proper choice of the parameters, the line can be made lossless even though R and G are non-zero
2. The line will have both amplitude and phase distortion in general
Of the statements
1. By proper choice of the parameters, the line can be made lossless even though R and G are non-zero
2. The line will have both amplitude and phase distortion in general
Of the statements
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Q230
Open questionWith wavelength λ in increasing order, which one of the following combination is correct?
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Q231
Open questionA 75 Ω transmission line is first short terminated and the minima locations are noted. When the short is replaced by a resistive load RL, the minima locations are not altered and the VSWR is measured to be 3. The value of RL is
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Q232
Open questionWhich one of the following Maxwell's equations gives the basic idea of radiation?
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Q233
Open questionWhich one of the following is the correct expression for torque on a loop in magnetic field ? (here is the loop moment).
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Q234
Open questionThe signal propagation time between two ground stations in a synchronous satellite link is about
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Q235
Open questionA conductor having surface density σ is embedded in a dielectric medium of permittivity ε. The electric field in the medium is E. If it is known that the pressure p on the conductor surface is equal to the electric energy density in the medium, then p (in SI units) is given by:
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Q236
Open questionA 50 Ω loss less transmission line is terminated in 100 Ω load and is exited by a 30 MHz source of internal resistance of 50 Ω. What should be the length of transmission line for maximum power transfer . . . . . . . .
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Q237
Open questionA transmission - line impairment is located 300 m from the source. For a velocity of propagation of 0.9 c, the time elapsed from the beginning of the pulse to reception of the echo is
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Q238
Open questionS parameters of a transmission line are S11, S12, S21 and S22. If the transmission line is symmetrical, what is the condition?
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Q239
Open questionFor a reflection coefficient of 0.5, the value of SWR is
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Q240
Open questionThe electric field of a uniform plane electromagnetic wave in free space, along the positive x direction, is given by The frequency and polarization of the wave, respectively, are
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