Assertion: core inductor | /r/CapableOf | use core
Facets:
value: often
type: TEMPORAL
value: with a square shape
type: OTHER
value: in the past
type: TEMPORAL
Source sentences:
text: Although in the past, closed-core inductors and transformers often used cores with a square shape, the use of toroidal-shaped cores has increased greatly because of their superior electrical performance.