Develop a table showing the speed of magnetic field rotation

Develop a table showing the speed of magnetic field rotation in ac machines of 4, 6, 8, and 10 poles operating at frequencies of 30, 50, and 120 Hz. Then, find the speed of a three-phase induction motor operating at 2.5% slip for the shaded cells. At f = 30 Hz and 6 poles, n_m = At f = 50 Hz and 8 poles, n_m = At f = 120 Hz and 4 poles, n_m =

Solution

Dear student your doubt is understood .It is a induction motor but we are taking the values as per given in the text book or any materials .Here slip is not the problem where as frequency selection also important so dont bother about this question the details in the question are correct and anwers are also correct.if you get farction value simply rounded off to next digit.