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  • Question

  • Most antenna consisting of a 50 meter long vertical conductor operates over a perfectly conducting ground plane. It is base fed at a frequency of 600 kHz. The radiation resistance of the antenna in ohms is


  • Options
  • A. Most antenna consisting of a 50 meter long vertical conductor operates over a perfectly conducting g
  • B. Most antenna consisting of a 50 meter long vertical conductor operates over a perfectly conducting g
  • C. Most antenna consisting of a 50 meter long vertical conductor operates over a perfectly conducting g
  • D. 20p2

  • Correct Answer
  •  

    Explanation
    Most antenna consisting of a 50 meter long vertical conductor operates over a perfectly conducting g

    Most antenna consisting of a 50 meter long vertical conductor operates over a perfectly conducting g

    Electromagnetic Field Theory problems

    Search Results

    • 1. Which one of the following potential does not satisfy Laplace's equations?

    • Options
    • A. v = 10 xy
    • B. v = p cos ?
    • C.
    • D. v = f cos ? + 10
      • Discuss
    • 2. The phase angle corresponding to ?/4 in a standing-wave pattern is

    • Options
    • A. 30°
    • B. 90°
    • C. 135°
    • D. 180°
      • Discuss
    • 3. The electric field on the surface of a perfect conductor is 2V/m. The conductor is immersed in water with ? = 80 ?0. The surface charge density on the conductor is ((?0 = 10-9/36p)F/m)

    • Options
    • A. 0 c/m2
    • B. 2 c/m2
    • C. 1.8 x 10-11 c/m2
    • D. 1.14 x 10-9 c/m2
      • Discuss
    • 4. The electric field of the incident wave is , where ? = 3 x 109p and ? = 10 p. The electric field of the transmitted wave Et is given by

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 5. A (75 - j 40) W load is connected to a co-axial line of z0 = 75? at 6 MHz. The load matching on the line can be accomplished by connecting

    • Options
    • A. a short circuit stub at the load
    • B. an inductance at the load
    • C. a short circuit stub at a specific distance from the load
    • D. a capacitance at a specific distance from the load
      • Discuss
    • 6. 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

    • Options
    • A. 4 mW
    • B. 1 mW
    • C. 7 mW
    • D. 1/4 mW
      • Discuss
    • 7. Find the radiation resistance of an antenna of length ?/10 meter?

    • Options
    • A. 8 ?
    • B. 780 ?
    • C. 7.8 ?
    • D. 78 ?
      • Discuss
    • 8. A transmission line is feeding 1 watt of power to a horn antenna having a gain of 10 dB. The antenna is matched to the transmission line. The total power radiated by the horn antenna into the free space is

    • Options
    • A. 10 watts
    • B. 1 watt
    • C. 0.1 watt
    • D. 0.01 watt
      • Discuss
    • 9. The radiation resistance of a ?/16 wire dipole in free space will be nearly

    • Options
    • A. 1 ?
    • B. 3 ?
    • C. 13 ?
    • D. 30 ?
      • Discuss
    • 10. In a conductor which of the following relations hold good?

    • Options
    • A. ? x D = r
    • B. ? . D = r
    • C. ? x D = 0
    • D. ? . D = 0
      • Discuss

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