A plane wave is characterized by the wave is linearly polarized circularly polar

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Question
A plane wave is characterized by the wave is
Options
A. linearly polarized
B. circularly polarized
C. elliptically polarized
D. unpolarized

Correct Answer

elliptically polarized

Explanation

Because, magnitude is different (0.5, 1) and phase is 90�

Electromagnetic Field Theory problems

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1. 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.
Options
A. 3 x 10⁸ m/sec
B. 5 x 10⁸ m/sec
C. 1.5 x 10⁸ m/sec
D. 9 x 10⁸ m/sec

2. For F₁ layer the maximum ionic density is 2.3 x 10⁴ electrons per cc. The critical frequency for this layer will be
Options
A. 1.36 MHz
B. 13.6 MHz
C. 136 MHz
D. 1360 MHz

3. Z_L = 200 ? and it is desired that Z_i = 50 ? The quarter wave transformer should have a characteristic impedance of
Options
A. 100 ?
B. 40 ?
C. 10000 ?
D. 4 ?

4. The input impedance of short-circuited line of length l where ?/4 < l < ?/2, is
Options
A. resistive
B. inductive
C. capacitive
D. none of the above

5. Characteristic impedance of a transmission line is 50 ?. Input impedance of the open circuited line.
Z_oc = 100 + J150 ?. When transmission line is short circuited, then value of the input impedance will be
Options
A. 50 ?
B. 100 + J150 ?
C. 7.69 + J11.54?
D. 7.69 - J11.54 ?

6. Consider a 300 ?, quarter wave long at 1 GHz transmission line as shown in figure. It is connected to a 10 V, 50 ? source at one end is left open circuited at the other end. The magnitude of the voltage at the open circuit end of the line is
Options
A. 10 V
B. 5 V
C. 60 V
D. 60/7 volt

8. The displacement flux density at a point on the surface of a perfect conductor is = 2(a_x - 3 a_z)c/m² pointing away from the surface. The charge density at that point c/m² will be
Options
A. 2
B. - 2
C. 4
D. - 4

9. The velocity of electromagnetic wave in a good conductor is
Options
A. 3 x 10⁸ m/s
B. more than 3 x 10⁸ m/s
C. very low
D. high

10. Which one of the following does represents the electric field lines for the TE₀₂ mode in the cross section of a hollow rectangular metallic waveguide?
Options
A.
B.
C.
D.

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