Parallel-Plate Capacitor
Product Code : SCL-PL-12365
Parallel-Plate Capacitor (SKU SCL-PL-12365) is a demonstration capacitor with two flat, parallel plates of 20 cm diameter whose separation can be varied, so students can see how the distance between the plates changes capacitance. It serves Class 12 physics and B.Sc. electrostatics teaching. The apparatus is easy to assemble and its markings are easy to read. Science Lab Supplies builds it in its own factory at Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, and quotes schools, colleges, distributors and tender contractors directly.
Specifications
This variable plate capacitor has two parallel plates of 20 cm diameter. Both the distance between the plates and the height of the plates are adjustable, the apparatus assembles easily, and clear markings let students record the plate separation for each reading during capacitance experiments.
| Parameter | Value |
|---|---|
| SKU | SCL-PL-12365 |
| Type | Flat capacitor with parallel plates (variable plate capacitor) |
| Plate diameter | 20 cm |
| Adjustments | Distance between plates; height of plates |
| Markings | Easy to read |
| Assembly | Easy to assemble |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Parallel-Plate Capacitor
The capacitor is used to show that capacitance falls as the plates move apart and rises as they come closer, in line with C = εA/d. Connected to a charging source and an electroscope or electrometer, it lets students watch the potential change as the separation is varied.
- Class 12 physics (electrostatic potential and capacitance): the parallel-plate capacitor and the effect of plate separation.
- Class 12 physics: the effect of inserting a dielectric sheet between the plates.
- B.Sc. electricity and magnetism: estimating the permittivity of air from plate area and separation.
- Teacher-training demonstrations: charge, potential and capacitance as related quantities.
Standard Scope of Supply
The Parallel-Plate Capacitor is supplied as a single apparatus as described above, with its two 20 cm plates and adjustable spacing. A charging source and an electroscope or electrometer are separate items and can be added to the quotation if your lab needs them.
Packing, MOQ and Lead Time
You can ask for a quotation for a single capacitor for demonstrations or several for a college practical lab. The quotation lists packing, delivery time and price for that number, and other items for an electricity and magnetism lab kit for schools can be priced with it.
Science Lab Supplies is registered with an Importer-Exporter Code and can ship to buyers in Kenya, Ghana, Ethiopia, Tanzania, Uganda and the UAE. Send your requirement through the contact page, collect items in the enquiry cart, or consult the lab tender page for tender supply.
Frequently Asked Questions
What size are the plates of the Parallel-Plate Capacitor?
Each of the two parallel plates is 20 cm in diameter. The distance between them and their height can both be adjusted, which is what makes capacitance experiments possible.
What experiment does a variable plate capacitor demonstrate?
It shows how capacitance depends on the separation of the plates: moving them apart lowers the capacitance, and bringing them closer raises it, as the parallel-plate formula predicts.
Is Science Lab Supplies the manufacturer or a trader?
Science Lab Supplies is the manufacturer. The capacitor is built at its own premises in Saha, Ambala, India, and customers receive quotations and dispatch directly from that factory.
What else is needed to run the experiment?
You need a way to charge the plates and to indicate potential, such as an electroscope or electrometer. These are separate items and can be quoted on the same enquiry.
Related Capacitance and Electrostatics Apparatus
These four items extend capacitor teaching from the parallel-plate model to circuits and charge sources. They cover charging and discharging, switchable capacitance values, a full electrostatics demonstration set and a machine for generating charge, and all can share one quotation with the capacitor.
- Capacitor (Charging and Discharging) — capacitor behaviour in a circuit.
- Capacitance Substitution Box — selectable capacitance values.
- Electrostatics Apparatus Set — conducting spheres, electrodes, bells and chains.
- Wimshurst Influence Machine — a source of electrostatic charge.
Browse the full Physics Lab range or all physics lab equipment.
Last updated: 25 September 2026
