A PT is a device which is ___________(a) Electrostatically coupled(b) Electrically coupled(c) Electromagnetically coupled(d) Conductively coupledThe question was posed to me in an online quiz.This intriguing question originated from Advanced Problems on C.T. and P.T. in section Extension of Instrument Ranges of Electrical Measurements

A PT is a device which is ___________(a) Electrostatically coupled(b)

1.	A PT is a device which is ___________(a) Electrostatically coupled(b) Electrically coupled(c) Electromagnetically coupled(d) Conductively coupledThe question was posed to me in an online quiz.This intriguing question originated from Advanced Problems on C.T. and P.T. in section Extension of Instrument Ranges of Electrical Measurements
Answer» The correct option is (C) Electromagnetically coupled The best explanation: A POTENTIAL TRANSFORMER cannot be electrostatically coupled since CRO are electrostatically coupled. ALSO, they cannot be conductively coupled. But since they are KIND of electrically coupled hence electromagnetically coupled is the only correct option.

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