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Apparatus Coulomb's Law
Apparatus Coulomb's Law (Product Code: SLE/PHY/09) is an electrostatics apparatus used to verify Coulomb's law by directly measuring the force between two charged spheres in school and college physics labs. One sphere hangs from the top of a box and the other rests on its bottom; students read the hanging sphere's deflection on a ruler, with a mirror to remove parallax. It is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India.
Key Details
| Parameter | Detail |
|---|---|
| Purpose | Verifies Coulomb's law of the force between charges by direct measurement |
| Sphere arrangement | One sphere suspended from the top of a box; the other rests on the bottom |
| Measurement | Deflection of the hanging sphere read on an easy-to-read ruler, from which the force is calculated |
| Parallax control | A mirror assures accuracy by eliminating parallax |
| Construction | Fully assembled and self-contained |
| Product code | SLE/PHY/09 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Coulomb's Law Apparatus Used For?
When the two spheres carry like charges and are brought together, the hanging sphere is pushed aside. Its sideways deflection, read on the ruler while lining the sphere up with its reflection in the mirror, lets students calculate the electrostatic force from the geometry of the suspension. Repeating the reading at different separations shows the force falling as the spheres move apart, which students then compare with the inverse-square relationship.
Electrostatic experiments work best in dry air, so run them away from open windows and humid corners, and discharge both spheres by touching them to earth between trials. Charge them from a source such as a friction rod or a suitable high-voltage supply, and keep hands and sleeves clear of the box while readings are taken. As educational physics lab equipment, it turns an abstract formula into a quantity students can measure for themselves.
OEM Manufacturer
Jain Scientific Equipments Private Limited sells under the ScienceLab brand and is the OEM (original equipment manufacturer) of the Apparatus Coulomb's Law. The apparatus is manufactured at the company’s licensed factory at Saha, Ambala, Haryana, India, and delivered fully assembled, so institutions and dealers buy it straight from the maker and can ask us directly about repeat orders or replacement parts. The company profile has more about the business.
Related Physics Lab Equipment
Electrostatics items used with this apparatus:
- Van de Graaff Generator — a source of charge for the spheres
- EHT Power Supply — an adjustable high-voltage supply for charging
- Friction Rod, Brass/Ebonite — charges the spheres by friction and contact in simple classes
- Electroscope, Gold Leaf — confirms the presence of charge before readings are taken
- Electrostatic Investigation — a related electrostatics item in the same range
Browse the full Physics Lab Equipment range for more electricity and electrostatics apparatus.
Frequently Asked Questions
What does the Apparatus Coulomb's Law measure?
The Apparatus Coulomb's Law measures the force between two charged spheres directly. One sphere hangs from the top of a box and deflects away from the other, and students read that deflection on a ruler to calculate the force and test Coulomb's law.
How does the mirror improve accuracy on the Apparatus Coulomb's Law?
The Apparatus Coulomb's Law includes a mirror that eliminates parallax. Students line up the hanging sphere with its reflection before reading the ruler, so the eye is square to the scale and every reading is taken from the same viewpoint.
Does the Apparatus Coulomb's Law need assembly?
No, the Apparatus Coulomb's Law is fully assembled and self-contained, with the spheres, box, ruler and mirror arranged ready for use. Teachers only need a means of charging the spheres before the class starts taking readings.
How are the spheres of the Apparatus Coulomb's Law charged?
The charging method is not specified in the description of the Apparatus Coulomb's Law. A friction rod or a suitable high-voltage source is commonly used in electrostatics work; tell us what your lab already has and we will advise on what fits.
Why can readings on the Apparatus Coulomb's Law vary from day to day?
Readings on the Apparatus Coulomb's Law can vary because charge leaks away faster in humid air. Work in a dry room, recharge the spheres before each set of readings, and take several measurements at each separation to average out the effect.
Who manufactures the Apparatus Coulomb's Law?
The Apparatus Coulomb's Law is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), the OEM, at its licensed factory at Saha, Ambala, Haryana, India, and sold factory-direct to schools, colleges, dealers and importers.
Can the Apparatus Coulomb's Law be supplied for export?
Yes, the Apparatus Coulomb's Law can be quoted for schools, colleges, dealers and importers in India and international markets. Send the quantity and destination through our contact page, and the quotation will come directly from the manufacturer.
Request a Quote
To request pricing for the Apparatus Coulomb's Law, use the contact page or add it to the enquiry cart; quotations are prepared directly by the manufacturer.
Last updated: 24 September 2026
