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

Electrical Machines

Electrical Machines
In a DC generator, if P be the number of poles and N be the rpm of the rotor, then frequency of magnetic reversals will be

 PN/2.
 PN/60.
 PN/3000.
 PN/120.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In a dc machine, the demagnetizing effect of armature reaction is due to

 non-sinusoidal nature of armature mmf
 magnetic saturation in half of the field pole
 uneven air-gap length
 component of armature mmf along field axis

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A compound motor has

  both shunt and series field winding.
  tertiary winding.
  only shunt field winding.
  only series field winding.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In which of the following DC Motor the ratio of starting torque to full load torque is minimum?

  Cumulative compound motor.
  Differential compound motor.
  Shunt motor.
  Series motor.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The slight curvature at the lower end of the OCC of a self excited DC generator is due to

  residual flux.
  high field resistance.
  magnetic inertia.
  high speed.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Direction of rotation of DC motor is reversed by

 Interchanging armature and field connection.
 Reversing supply connection.
 Reversing armature connection or field connection.
 Adding resistance to field circuit.

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Electrical Machines

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
↑