Answer Posted / mahadevan( auva project co ltd

where we can calculate total summation of charges in the line that is called potential transformer. actually potential which is measured in the open path only as same phenomena of emf(v/m).In the nature potential transformer are not possible to exist.because all measurement taking in the closed loop only.when it's closed loop we measure difference of charge (voltage).

where we measure difference(ex.5v) of positive charge (+5v)one side and negative charge(-5v) on other side can be called as voltage.this phenomena only suitable for all voltage transformer.

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