DGVCL Exam Paper (11-12-2011)
The form factor in AC means the ration of

R.M.S. value to peak value
Peak value to average value
R.M.S. value to average value
Peak value to r.m.s value

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DGVCL Exam Paper (11-12-2011)
Due to skin effect

Current flows through the half cross section of the conductor
Portion of the conductor near the surface carries less current and the core of the conductor carries more current
Uniform current flows through the conductor
Portion of the conductor near the surface carries more current and the core of the conductor carries less current

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