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  • Question
  • A parallel plate capacitor having C = 200 x 10-12 F has loss dielectric having tan ? = 4 x 10-4. At an ac voltage of f = 106 Hz and peak value 2 V, the dielectric losses are


  • Options
  • A. 10-8 W
  • B. 10-6 W
  • C. 10-4 W
  • D. 10-2 W

  • Correct Answer
  • 10-6

    Explanation
    Dielectric losses = v2 ?C tan ?.

    More questions

    • 1. The antenna current of an AM transmitter is 8 A, when only the carrier is sent, but it increases to 8.93 A when the carrier is modulated by a single sine wave. Determine the antenna current when the percent of modulation changes to 0.8

    • Options
    • A. 9.19 A
    • B. 9.91 A
    • C. 10.56 A
    • D. 8.61 A
    • Discuss
    • 2. A full wave rectifier type meter is used to measure the wave shape shown in figure. The voltmeter is calibrated to read rms value of sine wave. The reading of voltmeter will be

    • Options
    • A.
    • B.
    • C. 100 V
    • D. 111 V
    • Discuss
    • 3. AB + AB =

    • Options
    • A. B
    • B. A
    • C. 1
    • D. 0
    • Discuss
    • 4. Work function of oxide coated cathode is much lower than that of tungsten cathode.

    • Options
    • A. True
    • B. False
    • Discuss
    • 5. Which of the following is not a valid real constant in C?

    • Options
    • A. 426
    • B. 321.0
    • C. -621.231
    • D. +201.2314
    • Discuss
    • 6. The usable bandwidth of ridge wave guide

    • Options
    • A. is lower than that of rectangular waveguide
    • B. is higher than that of rectangular waveguide
    • C. is almost same as that of rectangular waveguide
    • D. is very small as compared to that of rectangular waveguide
    • Discuss
    • 7. A line is excited by a 100 V, 200 ohm source and is terminated by 100 ? resistance. If the voltage on line reaches steady value in 80 ns, the natural resonant frequency is

    • Options
    • A. 100 MHz
    • B. 50 MHz
    • C. 12.5 MHz
    • D. 6.25 MHz
    • Discuss
    • 8. The phase angle corresponding to ?/4 in a standing-wave pattern is

    • Options
    • A. 30°
    • B. 90°
    • C. 135°
    • D. 180°
    • Discuss
    • 9. The expression Y = pM (0, 1, 3, 4) is

    • Options
    • A. POS
    • B. SOP
    • C. Hybrid
    • D. none of the above
    • Discuss
    • 10. For very low frequencies, v0/vi in the given figure equals

    • Options
    • A. 1
    • B. 0
    • C. ?
    • D. 0.5
    • Discuss


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