• 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
Find the reactance voltage when current is changed from -2A to 2A in 4 sec and self inductance is 1H?

 4 V
 0 V
 1 V
 2 V

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
If a DC motor is connected across the AC supply it will

  Burn.
 Not run.
 Run at normal speed.
 Run at lower speed.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The reduced air gap results in an increase

  cost of operation.
  power factor.
  starting torque.
  breaking torque.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
If terminal voltage of one 1000 rpm shunt motor is reduced to half the speed of the motor will be

 1000 rpm
 500 rpm
 2000 rpm
 250 rpm

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In DC machines shape of net flux density is?

 flat tapped or trapezoidal
 saddle shape
 peaky in nature
 sine wave

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In dc machines, 1. reactance voltage is proportional to armature current 2.reactance voltage is proportional to core length 3.reactance voltage is due to self-flux of the coil undergoing commutation 4. armature-cross flux is neutralized by interpolar flux 5. interpolarmmf is more than armature mmf in the interpolar zone From these, the correct answer is

 1, 2, 3, 4
 1, 3, 5
 2, 3, 4
 1, 2, 5

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
↑