Assertion: resistor | /r/HasProperty | needed
Facets:
Source sentences:
text: If a resistor of exactly 100KΩ is needed (an unusual situation)
text: These resistors are mainly used when there is a need to sense the absence and presence of the light such as burglar alarm circuits, alarm clock, light intensity meters, etc.
text: Resistors are necessary and play an important role in nearly every modern electronic device.
text: Surely if a resistor is needed then Ring should supply it?