Assertion: cathode's surface | /r/HasProperty | perpendicular
Facets:
value: to the field
type: OTHER
Source sentences:
text: The force is in opposite direction to that of the field and an equipotential surface is perpendicular to the field thus the force on the electron is in the normal direction to the equipotential surface.
text: The force is in opposite direction to that of the field and an equipotential surface is perpendicular to the field thus the force on the electron is in the normal direction to the equipotential surface.