Oersted’s Law Apparatus STEM Lab Manufacturer,Supplier and Exporter in India
Product Code : SCL-M-12513
Bridge the gap between electricity and magnetism with the Oersted’s Law Apparatus STEM Lab manufactured by Educational Instrument India. Discovered in 1820 by Hans Christian Oersted, this classic physics experiment serves as a foundational milestone in electrodynamics, proving that an electric current flowing through a conductor generates a surrounding magnetic field.
Specifically built for middle schools, high schools, engineering colleges, and STEM workshops, this laboratory tool provides an undeniable, hands-on visual demonstration of magnetic field deflection. By adjusting current directions and observing immediate compass needle behavior, students gain an intuitive, empirical understanding of vector fields and electromagnetism.
Key Features & Benefits
Direct Electro-Magnetic Verification: Allows immediate observation of the relationship between electricity and magnetism as stated by Oersted's discovery.
Dual-Direction Clear Testing: Designed with a heavy-gauge copper or brass wire frame situated directly above and below a central magnetic compass to allow multiple orientation testing.
Integrated Fluid Movement: Features a highly sensitive, low-friction cobalt-steel magnetic needle with a jewel bearing to ensure rapid deflection even at lower electrical currents.
Resilient Construction: Manufactured by Educational Instrument India utilizing a robust, non-magnetic wooden or acrylic base plate to avoid interference with the experimental magnetic vectors.
Technical Specifications
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Parameter |
Details |
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Brand Name |
Educational Instrument India |
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Product Name |
Oersted’s Law Apparatus STEM Lab |
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Primary Concept |
Electromagnetism, Magnetic Fields, Ampere's Right-Hand Grip Rule |
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Conductor Material |
Heavy-duty, low-resistance insulated copper or bare brass wire frame |
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Base Material |
Non-magnetic polished hardwood or heavy-duty acrylic polymer |
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Compass Needle Type |
Premium magnetic steel needle with a low-friction jewel pivot |
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Compass Diameter |
Approx. 50 mm to 75 mm with clear cardinal direction markings |
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Power Requirements |
Safe low-voltage DC source (1.5V to 6V DC battery pack or lab power supply) |
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Terminals |
4mm color-coded (Red/Black) safety binding posts |
How to Use It: Step-by-Step Guide
Follow these steps to conduct a clean, unmistakable Oersted's Law demonstration in the laboratory:
Align with Earth's Magnetic Field: Place the apparatus on a non-metallic table. Before connecting any power, rotate the entire base until the integrated compass needle lies perfectly parallel to the wire running directly above it (pointing North-South).
Connect to a Power Supply: Wire the terminal binding posts to a low-voltage DC power supply or a battery container. Ensure a simple knife switch or momentary push-button is included in the circuit to prevent constant current drain.
Observe Deflection (Current Flowing North): Complete the circuit briefly. Observe how the magnetic needle immediately swivels away from its North-South alignment, moving to sit nearly perpendicular to the wire.
Apply the Right-Hand Rule: Have students use the Right-Hand Grip Rule (thumb pointing in the direction of conventional current, fingers curling in the direction of the magnetic field) to predict and verify which way the compass needle should swing.
Reverse the Current: Reverse the polarity of the wires at the binding posts. Close the switch again. Students will observe the compass needle deflect in the exact opposite direction as before, confirming that the orientation of a magnetic field depends on the path of the electric current.
Frequently Asked Questions (FAQs)
Q1: What exactly does Oersted’s Law state?
Oersted’s Law states that a steady electric current flowing through a straight wire conductor creates a circular magnetic field around it. The field lines wrap around the wire in planes perpendicular to the wire axis, and its polarity changes if the current's direction is reversed.
Q2: Why must the base of the apparatus be made of non-magnetic material?
If the base plate were made of a magnetic material like sheet iron or structural steel, it would warp, absorb, or heavily distort both the Earth's natural magnetic field lines and the artificial electromagnetic field generated by the wire. Educational Instrument India utilizes premium acrylic or hand-polished wood bases to eliminate this variable entirely.
Q3: Why shouldn't the circuit switch be left closed for long periods?
Because the conductor wire has very low electrical resistance, keeping the circuit closed establishes a near short-circuit condition. This drains batteries rapidly and causes the wire to generate resistive thermal heat (Joule heating). The experiment should only require brief, momentary current pulses to demonstrate deflection.
Q4: My compass needle is sluggish or sticky. How can I fix it?
Ensure the table lacks hidden iron components (like structural steel beams or screws underneath). If the needle pivot is stuck, gently tap the casing to break static friction, or contact your equipment manager to ensure the jewel bearing hasn't collected dust or debris over time.
