Electromagnetism
Product Code : SCL-MH-12622
Bring precision calibration and exceptional high-impact visual proof to your optical and electrical workshops with the premier Electromagnetism Comprehensive Demonstration Apparatus, exclusively designed and manufactured by Educational Instrument India. This multi-functional laboratory station is engineered specifically to convert the abstract vector math of fields, current distributions, and magnetic interactions into concrete, measurable empirical data logs. Optimized to cover up to 20 feasible experiments, this versatile kit serves as a core foundational asset for higher educational setups, university science wings, and polytechnic engineering laboratories.
In modern classical electromagnetism, tracking how an active electric current builds a structural magnetic field requires minimizing non-ideal variables like stray wire resistance, intermittent connections, and core alignment skew. Our master workstation solves this through heavy-gauge, neatly layered copper solenoid blocks, an ultra-responsive localized compass grid plate, and highly secure banana-plug tracking terminals. This lets students investigate the historical mechanics of Oersted's discovery, plot magnetic field configurations surrounding straight and coiled paths, and evaluate the Ampere forces shifting conductive elements with total mathematical repeatability.
The complete system includes a versatile array of modular attachments: an adjustable-turn Industrial Solenoid Module with an open internal viewing tunnel, interchangeable Ferromagnetic Core Bars (including high-permeability soft iron, brass, and insulating wood components), a classic Oersted Compass Stage, and a functional Electromagnetic Relay / Industrial Bell Circuit. Whether your physics curriculum involves tracking the real-time flux density variations of a coil, proving Lenz's Law under dynamic load steps, or analyzing how core materials alter the mechanical holding force of an active electromagnet, this workstation delivers pristine data. Trust Educational Instrument India to provide your classrooms with durable, ISO-certified laboratory gear built for generations of rigorous academic discovery.
Complete Curriculum Coverage Capabilities (20 Feasible Laboratories):
Direct Currents & Magnetic Fields: Recreating the historic milestones of Oersted’s discovery. Tracing the magnetic fields of a current around straight conductors. Mapping field circular lines surrounding a single loop and flat coils. Validating Right-Hand Grip rules and vector direction metrics.
Solenoid Engineering & Flux Variables: Mapping the uniform magnetic field inside a long solenoid block. Investigating how turn density and current affect magnetic flux. Comparing flux distributions between iron, brass, and air cores.
Electromagnet Mechanics & Holding Forces: Assembling and optimizing a high-performance industrial electromagnet. Measuring mechanical lifting force versus electric current inputs. Analyzing magnetic saturation parameters in soft iron yokes. Demonstrating temporary magnetism versus permanent magnetic remanence.
Industrial Circuits & Electromechanical Applications: Assembling a fully operational electromechanical relay circuit. Wiring and exploring the continuous contact-break loops of an electric bell. Evaluating induction responses and transient magnetic fields.
Product Specifications
Built to precision manufacturing parameters, this system meets international academic requirements (including global science board, AICTE, and ABET specifications).
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Hardware Specification Feature |
Detailed Engineering & Technical Parameters |
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Brand Registry |
Educational Instrument India (EII) |
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Product Model Code |
EII-EMG-APP-20X |
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Main Instructional Solenoid |
600 Turns of heavy-gauge insulated copper wire, wound on a rugged polymer bobbin with a 25mm clear internal viewing core |
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Max Current Allocation |
3.5 Amperes continuous duty cycle (Protected via integrated automatic resettable thermal cutout) |
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Interchangeable Cores Kit |
1x Soft iron core rod, 1x Solid brass core rod, 1x Polished wood insulating rod (Dimensions: 150mm $\times$ 20mm) |
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Oersted Compass Module |
Clear vertical pillar mounting with a 50mm liquid-damped magnetic compass pointer and an integrated metric level scale |
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Electromechanical Work-Panel |
Includes a heavy-duty industrial armature plate, adjustable contact points, and an active spring return line for relay/bell setups |
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Wiring Interface Ports |
4mm shrouded safety banana jacks with clear, laser-etched schematic diagram panels |
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System Structural Weight |
8.8 kg (Gross dry weight packed safely inside an impact-resistant safety transport hard-case) |
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Quality Standards |
CE Compliant, Manufactured within an ISO 9001:2015 Registered Facility |
How to Use It: Step-by-Step Laboratory Guide
The Electromagnetism Comprehensive Demonstration Apparatus features a modular design that supports quick configuration changes. Below are standard guidelines for setting up core field mapping and electromagnet experiments safely and accurately:
Experiment 1: Mapping the Magnetic Effects of an Electric Current (Oersted's Law)
Place the primary electro-mechanics panel board on a flat, stable laboratory benchtop. Turn the adjusting thumbscrews at the track base until the system matches horizontal alignment.
Mount the straight-wire conductor module into the central holding brackets, aligning the clear Oersted compass needle directly underneath the wire strand.
With the variable power supply turned off, align the wire segment along the natural local North-South magnetic line so the compass sits exactly parallel at a baseline reading.
Connect the 4mm banana jacks from the conductor terminals to the regulated DC Power Supply output ports. Set the current dial to zero.
Switch on the power supply and slowly raise the current output to 2.0 Amperes. Note the sharp, immediate deflection of the magnetic compass needle away from the wire axis, verifying that an electric current inherently creates an external magnetic field.
Reverse the polarity of the connection wires at the banana ports. Observe that the compass needle deflects in the exact opposite direction, validating the vector rules of the Right-Hand Grip framework.
Experiment 2: Placing an Industrial Electromagnet and Measuring Core Permeability
Mount the 600-turn solenoid module securely onto the primary workstation foundation. Connect its terminal ports across an ammeter to the DC power supply.
Slide the clear plastic field tray under the solenoid barrel and scatter a light, uniform layer of iron filings around the structure.
Pass a 1.5 Ampere current through the hollow air-core solenoid. Tap the tray gently and photograph the resulting alignment pattern to map the baseline solenoid magnetic field lines.
Turn off the current and slide the high-permeability soft iron core rod into the central tunnel of the solenoid. Place the steel armature lifting bar beneath the assembly.
Turn the power supply back on and set it to 1.5 Amperes. Notice that the iron core instantly magnetizes, picking up the heavy steel bar with substantial holding force. This occurs because the iron core focuses and amplifies the magnetic flux density.
Repeat this process using the brass and wood rods to show that non-magnetic materials do not alter flux pathways or amplify force, providing clear proof of core material permeability factors.
Device Care, Electrical Safety, and Calibration Maintenance
Overcurrent Prevention: Do not operate the solenoid at currents above 3.0 Amperes for extended periods. Excessive current generates resistive heat ($I^2R$), which can damage the internal copper wire enamel insulation over time.
Core Preservation: Keep the soft iron core rod dry and free of oil or grease. Wipe the rod down with a lint-free microfiber cloth after use and store it inside the padded slot of the safety case to prevent surface rust.
Compass Alignment: Never store the sensitive liquid-damped compasses close to the heavy neodymium bar magnets. Keeping them in strong magnetic fields for long periods can reverse or weaken the compass polarization, ruining its calibration for future experiments.
Frequently Asked Questions (FAQs)
Q1: Why does a soft iron core create a much stronger electromagnet than a solid steel core?A1: Soft iron has exceptionally high magnetic permeability and low coercivity, meaning it aligns its internal magnetic domains quickly under an external field and de-magnetizes almost completely when the current is cut off. Hard steel retains a large portion of its magnetic domains even after current flow stops, making it poor for controllable electromagnets or responsive relay circuits.
Q2: Can the electronic connectors tie directly into automated computer software?A2: Yes, absolutely. The interface pathways from Educational Instrument India are fully standardized. They can connect directly to common school data-logging setups, automated Hall Effect magnetic flux probes, and PC-based data collection software.
Q3: How does this apparatus protect students from accidental high-voltage shocks?A3: Safety is a core priority. The entire suite from Educational Instrument India is engineered to run on safe, low-voltage DC inputs (typically 0 to 12V, max 3.5A). It features fully insulated 4mm shrouded safety banana sockets that eliminate any risk of accidental shock during classroom labs.
Q4: Why does the electric bell circuit cycle its armature back and forth automatically?A4: It forms a dynamic electromechanical feedback loop. When the switch is closed, current flows through the electromagnet, pulling the spring armature forward to strike the gong. This movement automatically breaks the circuit contact point, cutting power to the magnet. The spring then snaps the armature back to its starting position, closing the circuit again and repeating the cycle continuously.
Q5: How can instructors easily clear iron filings off the tracking modules after a lab session?A5: To clean up easily, place a sheet of clean paper or a thin plastic sleeve over the field tracking tray before scattering the filings. After the experiment, simply lift the paper or sleeve away from the magnetic elements; the filings can then be poured cleanly back into their storage container without sticking to the equipment components.
