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resistor

vr.tr.resistor · thing-q5321

Let an agent identify resistor types and read their markings, explain how resistors are chosen and used in circuits, relay standards and ratings, and distinguish fixed resistors from variable, sensing and special forms.

Thing Registry Physical world and living systems PHY.OBJ
Bundle → Layer → Finding → QuestionsClassifiersWhat it isWhy it existsDistinguishing featuresWhat robots and AI may and may not doMoral aspectsOwnersLinks to other meta-modelsIdentity and identifiersDirect propertiesRecognitionCapabilities and actionsHazards and failure modesStandards and interfacesContext of useSources

Bundle → Layer → Finding → Questions Filled

4 bundles · 8 layers · 8 findings · 16 questions

Identify What resistor this is.

Type

Type and markings.

Type

Type.

  1. What type is the resistor, and how are its markings read? definition
  2. Is the component a fixed resistor, a variable one or a sensing device? boundary

Ratings

Ratings.

Ratings

Ratings.

  1. What do resistance, tolerance, power and temperature coefficient ratings mean? definition
  2. Which entry fits the specific sensing device? action
Use Circuit use.

Circuits

Circuit functions.

Circuits

Circuits.

  1. How are resistors used to set currents, divide voltages, bleed charge and terminate lines? provenance
  2. Which entry fits the specific circuit? action

Select

Selection.

Select

Select.

  1. How is a resistor value and type chosen for a given circuit? action
  2. What value and rating follow for the case in question? measurement
Standards Standards and manufacture.

Series

Preferred values.

Series

Series.

  1. What are the E-series preferred values and marking codes? provenance
  2. Which references are standard? provenance

Manufacture

Manufacture.

Manufacture

Manufacture.

  1. How are resistors of different types made? provenance
  2. Which entry fits electronic manufacturing? action
Context History and teaching.

History

History.

History

History.

  1. How did resistors develop from early wire coils to chip resistors? provenance
  2. Which entry fits the history of electronics? action

Teach

Teaching.

Teach

Teaching.

  1. How are resistors taught, and which misconceptions arise? provenance
  2. Which entry fits electronics education? action

Classifiers Filled

Family
Thing Registry
Category
Physical world and living systems
Entry kind
thing
Plane
PHY
Domain
PHY.OBJ
Other names and narrower kinds
liquid resistor, resistance thermometer, platinum resistance thermometer, photoresistor, zero-ohm link, bleeder resistor, inrush current limiter, heating element, Urdox, self-regulating heater, heating wire, power resistor

What it is Filled

A passive electronic component that opposes the flow of electric current with a defined resistance, used to set currents and voltages, divide voltages, terminate lines, dissipate power and sense temperature or light; resistors are made as carbon, metal film, wirewound, thick film and other types, rated by resistance, tolerance and power, and marked by colour bands or codes.

Why it exists Filled

Let an agent identify resistor types and read their markings, explain how resistors are chosen and used in circuits, relay standards and ratings, and distinguish fixed resistors from variable, sensing and special forms.

Distinguishing features Filled

  • Defined resistance
  • Passive two-terminal device
  • Types by material and construction
  • Standard value series

What robots and AI may and may not do Filled

Must not

  • Fit a resistor that will run above its power rating where it can overheat or ignite.
  • Substitute a part in a safety or medical circuit without the designer's approval.
  • Misreport a resistor's value or tolerance in a parts list.
  • Discard electronic waste outside proper collection.

Only with a human decision

  • Approving changes to a circuit that protects people, such as in medical or mains equipment.

May

  • Read a resistor's colour code or marking and report its value and tolerance.
  • Select resistors for a circuit within their rated power and voltage.

Moral aspects Filled

  • Small parts in critical circuits can decide whether a device is safe.
  • Electronic waste harms workers and environments where it is dumped.

Who is affected

  • Users of the equipment
  • Repair workers
  • Communities near e-waste sites

Owners Filled

Steward

The owner of the device it sits in; the manufacturer answers for the part's rating.

Links to other meta-models Filled

parent

  • Q6867168 - registry parent class

related

  • passive electronic component - the category
  • Ohm law - ideally
  • voltage divider - a basic circuit
  • thermistor - a temperature-dependent form

What else AI and robots need to interact with it Filled

Identity and identifiers required Filled

  • Vercy registry: vr.tr.resistor
  • Wikidata: Q5321 (https://www.wikidata.org/wiki/Q5321)
  • IEC 60062: marking codes colour and letter codes
  • E-series: IEC 60063 preferred values

Direct properties required Filled

  • common values: 1 ohm to 10 megohm range - E-series
  • power ratings: 0.05-100 W - typical, higher for power types

Recognition required Filled

  • Two-terminal component with defined resistance
  • Colour bands or printed codes
  • Thermistors, photoresistors and potentiometers are variable or sensing forms
  • A small cylindrical or rectangular component with two leads or terminals, often with colour bands, or a tiny chip on a circuit board.

Capabilities and actions required Filled

  • identify types and read markings
  • explain selection by resistance, tolerance and power
  • relay standards and series
  • distinguish related components

Hazards and failure modes required Filled

  • Overheating and burnout above rated power
  • Drift with temperature and age
  • Misreading markings
  • Open circuit failure

Standards and interfaces required Filled

  • IEC 60062 marking codes and IEC 60063 preferred values
  • IEC 60115 fixed resistor specifications
  • RoHS restrictions on materials

Context of use required Filled

  • Controlling current and voltage in circuits.
  • carbon composition and carbon film
  • metal film and metal oxide
  • wirewound and power resistors
  • thick and thin film chip resistors
  • variable resistors and potentiometers
  • sensing resistors: thermistors, resistance thermometers, photoresistors
  • special forms: zero-ohm links, bleeder resistors, liquid resistors

Sources Filled

  1. Wikidata item Q5321: resistor - identity and sense of the item
  2. Wikipedia: Resistor - general description of the item

Open questions

  • Should sensing resistors be separate entries?
  • How should standards be linked?
  • The registry entry has merged aliases naming sensing devices and special forms; should they be split off?

Machine files

Card as JSON Specification Card backlog vercy.card/1

Provenance

thing registry research (pass 2) · unreviewed

Built from: models/things/publications/thing-q5321/spec.json