Electromagnetic Field Theory - Section 1 (3)
Electromagnetic Field Theory - Section 1
| 17. | The divergence of the electric field intensity at any point equals |
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| 18. | Calculate the wave impedance for TM mode in rectangular waveguide for dominant mode at 3 GHz having |
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| 19. | Which of the following should dominant wave have? |
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Answer: Option A Explanation: Lowest cut off frequency or highest wave-length in a waveguide gives dominant modes. |
| 20. | A short circuited stub is shunt connected to a transmission line as shown in the figure is, if z0 = 500 ohms, the admittance y seen at the function of the stub and the transmission line is |
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| 21. | The electric field of the incident wave is |
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Answer: Option C Explanation: |
, where ω = 3 x 109
Et = Er
Ei.| 22. | A uniform plane wave is one in which |
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Answer: Option D Explanation: For uniform plane wave, E and H must be in a plane but perpendicular to each other. |
x
= 0| 23. | Consider a loss less antenna with a directive gain of + 6 dB. If 1 mW of power is fed to it the total power radiated by the antenna will be |
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| 24. | 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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