Resistance Board STEM Lab Manufacturer,Supplier and Exporter in India
Product Code : SCL-MBAVTOB-12518
Introduce students to the fundamental principles of current electricity and circuit design with the Resistance Board STEM Lab, manufactured by Educational Instrument India. This premier educational kit is an indispensable tool for physics laboratories, engineering institutions, and STEM learning centers. It provides a tactile, visual, and highly accurate methodology for investigating how material type, length, and cross-sectional area dictate electrical resistance.
Engineered with high-grade components to withstand rugged classroom use, this board bridges the gap between abstract mathematical formulas and physical, real-world electrical behaviors.
Product Description & Scientific Principles
The Resistance Board STEM Lab by Educational Instrument India consists of a heavy-duty, insulated base board mounted with a variety of conducting wires of different lengths, diameters (gauges), and material compositions. The board features secure, low-resistance binding posts or banana plug sockets at each endpoint, allowing students to seamlessly integrate the board into external circuits containing power supplies, voltmeters, and ammeters.
Core Learning Concepts Explored:
Effect of Material (Resistivity): By comparing identical dimensions of Copper, Nichrome, and Constantan (Eureka) wires, students observe how atomic structure influences electron drift and overall resistance.
Effect of Length: By testing different spans of the same wire, students verify the direct proportionality between a conductor's length and its resistance.
Effect of Cross-Sectional Area (Thickness): Utilizing various standard wire gauges (SWG) of the same material, students witness how a wider path decreases structural resistance.
Product Specifications
|
Parameter |
Technical Specification |
|
Brand Name |
Educational Instrument India |
|
Base Material |
High-density, warp-resistant laminated wood or industrial ABS polymer |
|
Wire Types Included |
Nichrome, Constantan (Eureka), Copper, and Brass |
|
Wire Lengths |
Pre-stretched and calibrated variants (e.g., 50 cm and 100 cm) |
|
Wire Gauges (Thickness) |
Multiple standard variations (typically 24 SWG, 28 SWG, and 32 SWG) |
|
Connection Terminals |
4mm insulated multi-way binding posts / banana sockets |
|
Built-in Scale |
Metric ruler (mm/cm graduations) aligned parallel to the test wires |
|
Target Application |
High School Physics, STEM Academy Modules, Engineering Undergrad Labs |
How to Use It: Step-by-Step Guide
Follow these guidelines to perform successful experimentation while maintaining the integrity of the apparatus:
Circuit Preparation: Set up an external DC power supply (0–6V), a digital multimeter (or analog ammeter and voltmeter), and connecting patch cords. Ensure the power supply is initially turned off.
Investigating Material Resistivity: Connect the test leads across the 100 cm Copper wire. Note the current and voltage readings. Apply Ohm’s Law to find the resistance. Repeat this process for the 100 cm Nichrome wire of the same thickness to see how resistivity changes the output.
Investigating Length Proportionality: Attach the terminal clips to the 50 cm mark of a selected wire and measure the resistance. Slide the clip to the 100 cm mark and observe how doubling the length directly doubles the resistance value.
Investigating Area Dependency: Connect to a thick wire (e.g., 24 SWG) and record its resistance. Switch the connection to a thin wire (e.g., 32 SWG) of the exact same material and length to observe how restricting the cross-sectional area increases resistance.
Data Logging: Have students plot graphs of Resistance vs. Length and Resistance to visually reinforce linear relationships.
Safety & Accuracy Tip: Do not leave the power supply active for extended periods. Electrical current generates heat, which raises the temperature of the wires. Because resistivity changes with temperature, taking quick readings avoids thermal variance errors and prevents accidental burns.
Frequently Asked Questions (FAQs)
Q1. What external instruments are required to use this board?
Ans: To conduct complete quantitative experiments, you will need a low-voltage DC power supply (or battery pack), a voltmeter, an ammeter (or two digital multimeters), and standard 4mm banana plug patch cords.
Q2. Why does the Resistance Board use Nichrome and Constantan wires?
Ans: Nichrome and Constantan have significantly higher electrical resistivity compared to excellent conductors like Copper. This produces measurable variations in voltage and current over short distances, making them ideal for precise educational demonstrations.
Q3. Can students burn out or snap the wires on the board?
Ans: The wires are durable but can overheat if excessive voltage is applied for long periods. We recommend keeping the input voltage under 6V DC and using momentary activations to prevent overheating or structural damage.
Q4. How do we clean or maintain the board?
Ans: Store the unit in a dry, dust-free environment. If the exposed wires tarnish or oxidize over time, they can be gently polished with a fine emery cloth or specialized contact cleaner to restore pristine, low-resistance connection points.
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