Answer / appar

in this situation current is flowing only the outer most
part of the conductor,that time current innerpart will get
heat it will act as a resistance and cross section of the
conductor will be less.

Answer / dham nazzal

Dham Nazzal
Hail

as my frriend says,
the cross section will not be reduced in phisycally,
however the useful or wsable cross section is reduced while
the conductor is the same,where the current will be flowing
in the outer more than the inner

HELLO EVERYONE, I RECENTLY HAVE FOUND ONE PROBLEM, I WAS TAKING NO LOAD TRIAL OF AN HT MOTOR 920 MOTOR , 1440 RPM , 6.6 KV, WITH AUTO TRANSFORMER. AT 450 V, LOAD WAS 40 AMP AND SPEED WAS 250 RPM. BUT AS WE INCREASE VOLTAGE FROM 450 TO 480V, LOAD BECOME 41 AND SPEED REDUCED TO SOME RPM . SO WHICH PHENOMENON ACTED HERE FOR REDUCING SPEED.?? AND IS IT HAPPENING ALWAYS OR IT IS RARE? I ALSO HAVE FACED SUCH PROBLEM WITH FEW LT MOTOR ALSO.

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