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f=60 \mathrm{HZ}at noloid spoed: N_{n o}=594 \mathrm{rpm}at full losd speed N_{f l}=558 \mathrm{rpm}(a)\text { generally synchronous speed }\left(N_{S}\right)=\frac{120 f}{P}we know that No-lord speed is almost equal to synchronous speed so N_{s} \simeq 594 \mathrm{rpm}P=\frac{120 \mathrm{f}}{N_{5}}=\frac{120 \times 60}{594}=12.12 \simeq 12Numper of p 8 es \simeq 12 \quad P=12(b)\text { \%. Slip }=\frac{N_{S}-N_{r}}{N_{S}} \times 100^{\circ} \%if number of poles is 12 then synchronousspeed N_{s}=\frac{120 \times 5}{p}=\frac{120 \times 60}{12}=600 \mathrm{rm}rated speed (or) full logd speed N_{r}=558 \mathrm{rpm}\begin{array}{l}\text { Slip }=\frac{600-558}{600}=\frac{42}{600}=0.07 \\\% \text { slip }=7 \% \quad \text { slip }=0.07\end{array} ...