Which of the following motor has the poorest speed regulation? Mark as favorite Copy Link Shunt motor Series motor Differential compound motor Cumulative compound motor Check Answer
For a D.C. shunt motor if the excitation is changed? Mark as favorite Copy Link torque will remain constant torque will change but power will remain constant torque and power both will change torque, power and speed, all will change Check Answer
Which of the following motors have almost constant speed over their full load range? Mark as favorite Copy Link AC. series motors Low resistance squirrel cage motors D.C. shunt motors Both (b) and (c) Check Answer
As compared to an induction motor, the air gap in a D.C. motor is? Mark as favorite Copy Link less than 50% between 50% and 90% same more Check Answer
ln a differentially compounded D.C. motor, if shunt field suddenly opens? Mark as favorite Copy Link the motor will first stop and then run in opposite direction as series motor the motor will work as series motor and run at slow speed in the same direction the motor will work as series motor and run at high speed in the same direction the motor will not work and come to stop Check Answer
The current drawn by the armature of D.C.. motor is directly proportional to? Mark as favorite Copy Link the torque required the speed of the motor The voltage across the terminals none of the above Check Answer
Differentially compound dc motors can find application is requiring? Mark as favorite Copy Link high starting torque low starting torque variable speed frequent on-off cycles Check Answer
The direction of rotation of a D.C. series motor can be changed by? Mark as favorite Copy Link interchanging supply terminals interchanging field terminals either of (a) and (b) above None of the above Check Answer
In which of the following applications D.C. series motor is invariably tried? Mark as favorite Copy Link Starter for a car Drive for a water pump Fan motor Motor operation in A.C. or D.C. Check Answer
When the speed of a dc motor increases? Mark as favorite Copy Link back e.m.f. increases and current drawn decrease back e.m.f. as well as current drawn both increase back e.m.f. as well as current drawn both decrease back e.m.f. decreases and current drawn increases Check Answer