logo

CuriousTab

CuriousTab

Discussion

Home ‣ Electronics and Communication Engineering ‣ Materials and Components See What Others Are Saying!
  • Question

  • An electron is moving around a proton, in a circle of radius R. If flux density in the region is increased from zero to B, the force on the electron is


  • Options
  • A. An electron is moving around a proton, in a circle of radius R. If flux density in the region is inc
  • B. eR (dB / dt)
  • C. eRB
  • D. An electron is moving around a proton, in a circle of radius R. If flux density in the region is inc

  • Correct Answer
  •  

    • More questions

    • 1. A waveguide connected to a circularly polarized antenna must be able to efficiently propagate both vertically and horizontally polarised waves.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. Which of the following noise does not occur in transistors?

    • Options
    • A. Partition noise
    • B. Shot noise
    • C. Flicker noise
    • D. Resistance noise
      • Discuss
    • 3. Which of the following modes cannot exist in rectangular resonant cavity?

    • Options
    • A. TE110
    • B. TE011
    • C. TM110
    • D. TM111
      • Discuss
    • 4. In microstrip line has dielectric material most commonly used is

    • Options
    • A. silicon
    • B. rubber
    • C. plastic
    • D. bakelite
      • Discuss
    • 5. In a full bridge inverter fed by a battery of voltage V, the rms value of fundamental component of output voltage is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 6. The units of polarization of dielectric are

    • Options
    • A.
    • B.
    • C. Cm
    • D.
      • Discuss
    • 7. In terms of R, L, G and C the propagation constant ? of a transmission line is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 8. Calculate the directivity of an antenna for ?E = 30°, ?H = 60

    • Options
    • A. 46
    • B. 23
    • C. 50
    • D. 100
      • Discuss
    • 9. In a step down chopper using time ratio control, the input voltage is V and duty cycle is a. The load is purely resistive having resistance R. The average and rms load currents are

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 10. In a single phase full wave ac regulator the rms value of load current is 20 A load is purely resistive. Then

    • Options
    • A. average thyristor current will be less than 20 A but rms thyristor current will be more than 20 A
    • B. both the average and rms thyristor currents will be less than 20 A
    • C. both the average and rms thyristor currents will be more than 20 A
    • D. rms thyristor current will be 20 A and average thyristor current will be 10 A
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.