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For a C.T. the turns ratio is defined as the _________(a) n = ^Np ⁄ Ns(b) n =^1 ⁄ Np(c) n = Ns(d) n =^Ns ⁄ NpI have been asked this question during an interview for a job.This interesting question is from Ratios of Instrument Transformers in chapter Extension of Instrument Ranges of Electrical Measurements

Answer»

Correct option is (d) N =^NS ⁄ Np

For explanation I would say: For a current transformer, the turns RATIO is defined as the ratio of the NUMBER of turns in the secondary winding to the number of turns in the primary winding.

n =^Ns ⁄ Np

where, n is the turns ratio

Ns is the secondary turns

Np is the primary turns.


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