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  • Question

  • Space wave may be a direct wave or wave reflected from earth.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • False 

    Explanation
    Strength of space wave depends on distance as it suffers attenuation.

    More questions

    • 1. A class A chopper has an input voltage of 200 V. Ton = 1.5 ms and Toff = 4.5 ms. The duty cycle, average output voltage and ripple factor respectively are

    • Options
    • A. 0.5, 100 V and 1
    • B. 0.25, 50 V and 3
    • C. 0.25, 50 V and 1
    • D. 0.5, 100 V and 3
      • Discuss
    • 2. The velocity factor of a transmission line depends on

    • Options
    • A. temperature
    • B. skin effect
    • C. relative permittivity of dielectric
    • D. none of the above
      • Discuss
    • 3. For node 1 in figure, KCL equation is

    • Options
    • A.
    • B.
    • C.
    • D. none of the above
      • Discuss
    • 4. Maxterm designation for A + B + C is

    • Options
    • A. M0
    • B. M1
    • C. M3
    • D. M4
      • Discuss
    • 5. Expression ++i is equivalent to

    • Options
    • A. i = i + 2
    • B. i = i + 1
    • C. i = i - 1
    • D. i = i + i + i
      • Discuss
    • 6. An LVDT is used to measure displacement. The LVDT feeds a Voltmeter of 0-5 V range through a 250 gain amplifier. For a displacement 0.5 mm the output of LVDT is 2 mV. The sensitivity of instrument is

    • Options
    • A. 0.1 V/mm
    • B. 0.5 V/mm
    • C. 1 V/mm
    • D. 5 V/mm
      • Discuss
    • 7. Consider the following statement: In case of a superconductor

      1. B = 0
      2. ?r is high
      3. diamagnetism is high
      4. transition temperature varies with isotopic mass.
      Of the above statements

    • Options
    • A. 1 and 2 are correct
    • B. 2, 3, 4 are correct
    • C. 1, 3, 4 are correct
    • D. 2, 4 are correct
      • Discuss
    • 8. An electron (charge -e) is rotating in a circular orbit of radius R, around a proton with charge +e at a constant angular velocity ?. The orbital magnetic dipole moment is

    • Options
    • A. 0.5 e? R2
    • B. e? R2
    • C. 2 e? R2
    • D. 0.5 e? R3
      • Discuss
    • 9. For a given value (n) of principle quantum number, the number of possible electronic states are

    • Options
    • A. n
    • B. n2
    • C. n3
    • D. n
      • Discuss
    • 10. A dielectric of relative permittivity ?r is subjected to a homogeneous electric field E. The dipole moment P per unit volume is given by

    • Options
    • A. P = constant
    • B. P = ?0 E
    • C. P = ?0(?r - 1) E
    • D. P = ?r E
      • Discuss

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