Assertion: galvanometer | /r/CapableOf | give a zero reading
Facets:
value: for an unknown voltage
type: CAUSE
Source sentences:
text: If the length of the R 1 resistance wire is AB, where A is the (-) end and B is the (+) end, and the movable wiper is at point X at a distance AX on the R 3 portion of the resistance wire when the galvanometer gives a zero reading for an unknown voltage, the distance AX is measured or read from a pre-printed scale next to the resistance wire.