Resistance Coil
Product Code : SCL-PLE-11787
The StemAids Resistance Coil is a precision-wound electrical component engineered for the empirical study of Ohm’s Law, bridge balancing, and circuit calibration. Optimized for Secondary and University-level physics, these coils provide a stable, known resistance value with minimal inductive and capacitive interference. Manufactured to ISO 9001:2015 standards, they serve as reliable reference standards for quantifying current flow and potential difference within institutional laboratory environments.
Technical Specifications
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Tender Specification |
OEM Technical Detail |
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Resistive Element |
Non-inductively wound Constantan or Manganin wire |
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Standard Values |
Available in 1Ω,2Ω,5Ω,10Ω,20Ω,50Ω,100Ω (Custom available) |
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Accuracy / Tolerance |
Typically ±1% to ±2% (Standard Class) |
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Housing Construction |
High-impact transparent or opaque polymer case |
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Interface Hardware |
4mm safety-shrouded sockets or heavy-duty brass terminals |
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Power Rating |
Typically 1W to 5W (depending on wire gauge) |
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Thermal Stability |
Low temperature coefficient of resistance (α) |
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ISO Compliance Code |
Manufactured under ISO 9001:2015 Quality Management Systems |
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HS Code |
8533.21.00 (Fixed electrical resistors) |
Export to Sheets
Key Pedagogical Outcomes (Bloom’s Taxonomy Alignment)
- Standardized Interface: Facilitates student visualization of fixed resistance in a circuit, supporting the verification of Ohm's Law (V=IR) and Kirchhoff’s Laws.
- Resistivity Quantification: Enables the physical study of material properties, allowing learners to apply measurement techniques to compare the resistivity of different alloy types.
- Bridge Component Analysis: Supports the analysis of the Wheatstone Bridge and Potentiometer experiments by acting as the "known" resistance (R) to find an "unknown" (S).
- Thermal Evaluation: Allows students to evaluate the effects of heating on resistance by monitoring changes in value during prolonged current flow.
International Logistics & Compliance
StemAids ensures comprehensive OEM readiness for global institutional procurement:
- Packaging: Export-grade seaworthy crating (ISPM-15 compliant) featuring moisture-barrier shrink-wrapping to protect the internal wire from oxidation during maritime transit.
- Documentation: Includes Manufacturer’s Authorization Form (MAF), Certificate of Conformance (CoC), and a datasheet indicating the specific wire gauge and alloy used.
- Durability: Tropicalized design featuring hermetically sealed or vented cases (depending on wattage) to ensure stable resistance values in high-humidity laboratory climates.
Direct OEM Sourcing Advantages
Procuring StemAids Resistance Coils directly ensures vertical manufacturing control:
- In-House Non-Inductive Winding: Coils are wound using the "bifilar" method (doubled back on themselves) to cancel out self-inductance, ensuring they perform accurately in both DC and AC experimental circuits.
- Batch-Tested for Precision: Every coil is verified against a 6.5-digit digital multimeter to ensure it falls strictly within the specified tolerance.
- Direct Factory Spares Availability: Guaranteed availability of matching bridge wires, jockeys, and galvanometers to provide a complete "Electricity and Magnetism" laboratory kit.
- Manufacturing Control: Direct oversight of the wire-to-terminal soldering process ensures ultra-low contact resistance, preventing systematic errors in student data collection.
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