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  • Question
  • An energy signal has G(f) = 10. Its energy density spectrum is


  • Options
  • A. 10
  • B. 100
  • C. 50
  • D. 20

  • Correct Answer
  • 100 

    Explanation
    Energy density spectrum = |G(f)|2 = |10|2 = 100.

    More questions

    • 1. In a modified series inverter

    • Options
    • A. the maximum output frequency is less than frequency of damped oscillations
    • B. the output frequency can be even higher than the frequency of damped oscillations
    • C. the output frequency cannot exceed the frequency of damped oscillations
    • D. any of the above
    • Discuss
    • 2. In which of the transformer is the secondary nearly short circuited under normal operating conditions?

    • Options
    • A. CT
    • B. PT
    • C. Distribution transformer
    • D. Power transformer
    • Discuss
    • 3. The life time of a geosynchronous communication

    • Options
    • A. 5
    • B. 10
    • C. 20
    • D. 50
    • Discuss
    • 4. If rv is reflection coefficient and VSWR is voltage standing wave ratio, then

    • Options
    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 5. In figure ID = 4 mA. Then VS =

    • Options
    • A. 20 V
    • B. 4.4 V
    • C. 0.4 V
    • D. 0.44 V
    • Discuss
    • 6. The iron core of a coil is removed so that it becomes an air cored coil. Its inductance will

    • Options
    • A. increase
    • B. decrease
    • C. remain the same
    • D. may increase or decrease
    • Discuss
    • 7. In a klystron amplifier the force on all electrons

    • Options
    • A. causes acceleration of all electrons
    • B. causes retardation of all electrons
    • C. causes acceleration of some electrons and retardation of others
    • D. none of the above
    • Discuss
    • 8. A material has N spins per m3. If Np are the dipoles per m3 parallel to field and Na are the dipoles per m3 anti-parallel to field, the magnetisation is

    • Options
    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 9. The types of carriers in a semiconductor are

    • Options
    • A. 1
    • B. 2
    • C. 3
    • D. 4
    • Discuss
    • 10. In the given figure power meters at A and B indicate 1 mW and 110 ?W respectively. VSWR of line is

    • Options
    • A. 1.5
    • B. 2
    • C. 2.5
    • D. 3
    • Discuss


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