Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / rathish
In any DC motor the speed depends inversely on the flux.
Consider when starting a series motor the current flowing
will be high, but the flux that the motor produces will be
moderate since the series winding has less number of turns.
If u start the motor without load the speed will increase.
as speed increases the back emf increases. this decreases
the current through the series winding and hence flux
decreases and the speed further increases. Theorerically
speaking the speed becomes infinite. But practically the
motor will accelerate to very high speed , which will damage
the motor. But if you start the motor with the load, you are
actually reducing the starting speed hence the motor runs
safely. Since series motors has this property it is used in
trains to pull high load.
shunt motor starting torque is
marginal and hence it should be started with least load.
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
dear sir i need je civil p.way question model
sir i want technician grade-3 (carpenter) model question paper
how do i prepare for the upcoming exam for physiotherapist in rrbi and plz send previous question paper for this post
sir ,iam an B.Tech ece student applied for the post of section engineer(signal)2010 and i want to know the previous questions of this examination.so sir,please forward the model papers of the above mentioned categorie to my mail id:shriragini.k@gmail.com
sir i am selected as a bank clerk and i want leave for MBA 3rd sem exam should i will get leave for EXAM. tell me the process to get leave?
please send me rrb chennai previous 3 years question paper for electrical engineer with syllabus
sir please send last 5 years papers of Asst.loco Polot exam of Secunderabad board
I AM PREPARING THE RRB, CHENNAI FOR THE POST OF SECTION ENGINEER IN ELECTRONICS DIVISION. KINDLY SEND THE USEFUL FILE?
Please anybody let me know whether RRB chennai will conduct JE & SSE exams next year (2017)?
sir,i'm a M.C.A student.Which posts are suitable for me.Is there any possibility to apply one or more jobs.
plz. send me a rrb assistent loco pilot previous papers
please sent a rrb assistant station master previous question paper?
where can we search the previous question papers for station master,ticket collector,goods gaurds...plz mention book name.
please give me information about rrb technical cadre exam for eee dept....also mailme some previous year questn papers..my id is gj.1892@gmail.com
please send me the question paper and syllabus for asst station master post
