i just read in a buk tht the motion of the coil of a d.c motor is jerky as the magnetic couple is max at 0 degree nd 180 degree  and  zero at 90 degree nd 270 degree ........ it is also given tht this jerky motion can be made smooth by .......(quotng the book...

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(.....TO HAVE A UNIFORM CIRCULAR MOTION , NO. OF COILS R WOUND ON THE SAME SOFT IRON CORE AT AN ANGLE OF FEW DEGREE 2 EACH OTHER SUCH THT IF MAGNETIC COUPLE WEAKENS IN ONE COIL IT BECUMS MAX IN OTHER COIL.......)(

PLZZZ  I CAN;T UNDERSTND THE EXPLANATION THT HW THE MOTION CAN BE MADE SMOOTH.......... ANY1 DO HELP......