Question

In the ring type of core, the secondary winding is ________

(a) non-uniformly distributed over the core

(b) shorted with the primary winding

(c) uniformly distributed over the core

(d) connected in the form of a ring

This question was posed to me in an internship interview.

This key question is from Design Features of Current Transformers in section Extension of Instrument Ranges of Electrical Measurements

Answer 1

The correct answer is (c) uniformly distributed over the core

For explanation I would say: The ring type of core used for a secondary winding is a jointless core. It has a very small leakage reactance. Hence in a ring type of core, the secondary winding is uniformly distributed over the core.