• HOME
  • QUIZ
  • CONTACT US
EXAMIANS
  • COMPUTER
  • CURRENT AFFAIRS
  • ENGINEERING
    • Chemical Engineering
    • Civil Engineering
    • Computer Engineering
    • Electrical Engineering
    • Mechanical Engineering
  • ENGLISH GRAMMAR
  • GK
  • GUJARATI MCQ

Electromagnetic Field Theory

Electromagnetic Field Theory
If the static magnetic flux density is B, then

 Curl of B = 0.
 Divergence of B = J.
  Divergence of B = 0.
 Curl of B = J.

ANSWER DOWNLOAD EXAMIANS APP

Electromagnetic Field Theory
In above problem the induced emf will be reduced to half if the conductor moves an angle of

  30° to the direction of field.
  45° to the direction of field.
  60° to the direction of field.
  75° to the direction of field.

ANSWER DOWNLOAD EXAMIANS APP

Electromagnetic Field Theory
A solid sphere made of insulating material has a radius R and has a total charge Q distributed uniformly in its volume. What is the magnitude of electric field intensity, E, at a distance r (o less than r less than R) inside the sphere

 Q/(4 π εo r3).
 QR/(4π εo r3).
 3 Qr/(4 π εo R3).
 Qr/(4 π εo R3).

ANSWER DOWNLOAD EXAMIANS APP

Electromagnetic Field Theory
What is the value of total electric flux coming out of a closed surface?

 Equal to the surface charge density.
 Zero.
 Equal to total charge enclosed by the surface.
 Equal to volume change density.

ANSWER DOWNLOAD EXAMIANS APP

Electromagnetic Field Theory
The energy stored in the magnetic field in a solenoid 10 cm long and 4 cm diameter wound with 2000 turns of wire carrying a current at 20 amp, is

 15 joules.
 12 joules.
 24 joules.
 30 joules.

ANSWER DOWNLOAD EXAMIANS APP

Electromagnetic Field Theory
Magnetic circuit with cross sectional area of 20 cm2 is to be operated at 50 Hz from 120 Vrms supply. The number of turns required to active a peak magnetic flux density of 1.8 T in the core flux is

 300.
 600.
 450.
 150.

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Electromagnetic Field Theory

DOWNLOAD APP

  • APPLE
    from app store
  • ANDROID
    from play store

SEARCH

LOGIN HERE


  • GOOGLE

FIND US

  • 1.70K
    FOLLOW US
  • EXAMIANSSTUDY FOR YOUR DREAMS.
  • SUPPORT :SUPPORT EMAIL ACCOUNT : examians@yahoo.com

OTHER WEBSITES

  • GUJARATI MCQ
  • ACCOUNTIANS

QUICK LINKS

  • HOME
  • QUIZ
  • PRIVACY POLICY
  • DISCLAIMER
  • TERMS & CONDITIONS
  • CONTACT US
↑