Question

Secondary and primary windings consist of ________

(a) copper turns

(b) 14 S.W.G copper wire and copper strip respectively

(c) iron coils wound around

(d) laminations

The question was asked by my college professor while I was bunking the class.

Asked question is from Design Features of Current Transformers topic in division Extension of Instrument Ranges of Electrical Measurements

Answer 1

Correct answer is (b) 14 S.W.G copper wire and copper strip respectively

Easy explanation: For a current transformer the most popular form used is the bar primary and ring core construction. Hence 14 S.W.G copper wire is used for the secondary winding whereas a copper strip is used for the primary winding.