Electromagnetic Field Theory - Section 1 (5)
Electromagnetic Field Theory - Section 1
| 33. | Consider a 300 Ω, quarter wave long at 1 GHz transmission line as shown in figure. It is connected to a 10 V, 50 Ω 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 |
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Answer: Option A Explanation: |
γ = jβ| 34. | Radiation intensity of a dipole depends strongly on frequency. If at a frequency f, the intensity of radiation is 'I'. Then at a frequency of f/2, the intensity will be |
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Answer: Option A Explanation: I ∝ f. |
| 35. | The velocity of electromagnetic wave in a good conductor is |
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, for good conductor εr >> 1.| 36. | 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? |
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Answer: Option C Explanation: |
| 37. |
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Answer: Option B Explanation: fc = √9Nmax . |
| 38. | A wave is propagated in a waveguide at frequency of 9 GHz and separation is 2 cm between walls Calculate group velocity for dominant mode. |
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| 39. |
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for dominant mode.| 40. | Charge needed within a unit sphere centred at the origin for producing a potential field, |
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