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Answer Posted / madasamy
1.wats used in motors.. KVA used in transformers .
2.motor power depens on P.F therfore motor power equal to v.i.cos(pi)
3. but transformer power depends only v and i so p=vi
if transformer capacity 100 KVA is equal to 100*0.9=90kw we assumming p.f is 0.9
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