why the desirable efficiency for a motor is 60%, but in case of transformer, it is above 90%?
Answer Posted / swapnil hete
Motor is the dynamic device so, frictions losses& windage losses is include in the total losses.
on the other hand trnasformer is the static device hence there is no frictions losses & windage losses
| Is This Answer Correct ? | 11 Yes | 1 No |
Post New Answer View All Answers
armature is that part in which current is induced since in dc motor we supply current to the conductor so why we call it armature?
If the rated speed of a d.c. Shunt motor is1440 r.p.m, which method of speed control would you suggested to obtain a speed of 1500 r.p.m?
Assuming that a dedicated neutral earthing transformer is provided for each GT generator, when the two generators are running in parallel, has consideration been given that the earth fault current from one generator stator winding be split between the two neutral earthing transformers? If so, what adverse impact will this have on the operation of the 59N and 27TN devices?
why output is out of phase in case of common emitter?
what is the use of expulsition protective gap in 11Kv line.
We have studied about many techniques for finding the stability of system, ROOT LOCUS, ROUTH, BODE PLOT, POLER PLOT etc. In these which is used where. what are the difference among them... PLZ tell me.......
An impedance of 100 ohms resistance and an unknown inductance is connected across the capacitor. The resulting impedance is a pure resistance of 500 ohms ifω = 10^5 rad/sec. calculate the values of inductor and capacitor.
Is it required to lay 2 runs of GI wires along with armoured cables from one power DB Machines of higher rating?
what is meant by motor startup supervision & motor load jam protection ?
when elecromagnatic waves are propogated in a wave guide?
excitation limit of an excitor
how we will deside the high voltage value
how to calculate single phase motor efficiency ?
1)What is a Triode? What are its uses? 2) What is a Triac? 3) What is a Thyristor?
How to size fuse? How to size MCB?