Coulomb’s sphere Manufacturer,Supplier and Exporter in India
Product Code : SCL-ES-12912
The Educational Instrument Coulomb’s sphere is an electrostatics demonstration accessory used to help students observe how charged spherical conductors interact. It supports classroom explanations of attraction, repulsion, charge distribution, electric potential, and the relationship between charge separation and electrostatic force.
This apparatus is best used with compatible electrostatic generators, electroscopes, proof planes, insulated supports, or Coulomb’s law demonstration setups. It is useful for qualitative demonstrations where students need to see how charged bodies influence each other. For related teaching equipment, explore our Electrostatics & Sound equipment and Physics Lab Equipment.
Key Features
Coulomb’s sphere apparatus for classroom electrostatics and charged-body demonstrations.
Useful for explaining Coulomb’s law concepts, attraction, repulsion, and charge interaction.
Supports lessons on electric fields, conductor charging, induction, and charge distribution.
Suitable for teacher-led school, college, and STEM laboratory demonstrations.
Can be paired with compatible electrostatic generators and electroscopes.
Non-volumetric physics apparatus; no liquid capacity or measuring capacity applies.
Final material, diameter, support type, and supplied configuration should be confirmed before publication.
Technical Specifications
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Specification |
Detail |
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Product Name |
Coulomb’s sphere |
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Brand |
Educational Instrument |
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Product Category |
Physics Lab Equipment / Electrostatics Demonstration Apparatus |
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Primary Keyword |
Coulomb’s sphere apparatus |
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Secondary Keywords |
Coulomb sphere, Coulomb’s law apparatus, electrostatic sphere, charged sphere apparatus, static electricity demonstrator, electric field apparatus, Van de Graaff accessory, physics demonstration apparatus |
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Capacity |
Not applicable; this is a non-volumetric demonstration apparatus |
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Included Components |
Coulomb’s sphere assembly: [confirm final supplied parts] |
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Compatible Apparatus |
Compatible electrostatic generator, electroscope, proof plane, or Coulomb’s law setup: [confirm model compatibility] |
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Standards / Certifications |
No product-specific certification confirmed |
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Intended Users |
Physics teachers, students, schools, colleges, STEM labs, science activity centres |
What's Included in the Kit
Coulomb’s sphere body: [confirm]
Insulated support or mounting stem: [confirm]
Base or stand arrangement: [confirm if supplied]
Connection point for compatible electrostatic apparatus: [confirm]
Instruction sheet or experiment guide: [confirm if supplied]
Protective packing or storage box: [confirm if supplied]
Applications / Uses
Demonstrating attraction and repulsion between charged bodies.
Explaining Coulomb’s law concepts through classroom observation.
Showing charge distribution on a spherical conductor.
Demonstrating electrostatic induction and conductor charging.
Supporting lessons on electric fields, electric potential, and static electricity.
Pairing with compatible apparatus such as the Van de Graaff Generator STEM Lab.
How to Use the Coulomb’s sphere
Place the Coulomb’s sphere and compatible electrostatic apparatus on a clean, dry laboratory bench.
Mount the sphere securely on its insulated support or recommended stand.
Connect or position the sphere as required by the planned demonstration.
Charge the sphere gradually using a compatible electrostatic generator or charging method.
Bring another charged object or detector near the sphere to observe attraction, repulsion, or induction.
Compare the observed effect at different distances if the lesson covers Coulomb’s law concepts.
Stop the electrostatic source and discharge the sphere safely before handling.
Safety note: Use only under trained supervision. Keep hands dry, avoid touching charged conductors, and discharge the apparatus before adjustment, removal, or storage.
Care & Maintenance
Store the Coulomb’s sphere in a dry cabinet to reduce moisture-related charge leakage.
Keep the conducting surface clean, smooth, and free from dust, oil, or corrosion.
Inspect the insulated support and mounting point before every demonstration.
Do not use the apparatus if the sphere, support, or connector is loose or damaged.
Why Choose Educational Instrument
Educational Instrument manufactures and exports scientific laboratory instruments, lab experiment setups, science kits, mathematics kits, didactic models, and STEM models for academic institutions. The brand supplies practical teaching apparatus for schools, colleges, laboratories, and training centres. The Coulomb’s sphere supports clear classroom demonstrations of electrostatic interaction and helps teachers explain charge behaviour with a simple, observable spherical conductor.
Frequently Asked Questions
What is a Coulomb’s sphere apparatus used for?
A Coulomb’s sphere apparatus is used to demonstrate charge interaction, attraction, repulsion, electrostatic induction, and Coulomb’s law concepts in physics laboratories.
How does Coulomb’s sphere help explain Coulomb’s law?
Coulomb’s sphere helps students observe how charged bodies interact. It can support qualitative demonstrations of how electrostatic force changes with charge condition and separation distance.
Can Coulomb’s sphere be used with a Van de Graaff generator?
Yes, it can be used with a compatible Van de Graaff generator or other suitable electrostatic apparatus. Final mechanical and electrical compatibility should be confirmed before purchase.
Is this apparatus suitable for school laboratories?
Yes. Coulomb’s sphere is suitable for school and college physics laboratories when used under teacher supervision and with proper electrostatic safety precautions.
Does Coulomb’s sphere have a capacity?
No. Coulomb’s sphere is a non-volumetric electrostatics apparatus, so liquid capacity or measuring capacity is not applicable.
What should be checked before using Coulomb’s sphere?
Check that the sphere is dry, the conducting surface is clean, the insulated support is stable, and the electrostatic apparatus can be discharged safely after use.
For more electrostatics teaching equipment, visit the Electrostatics & Sound category or compare related classroom instruments such as the Gold Leaf Electroscope STEM Lab.
