Apparatus for Studying f.e.m. and Internal Battery and Battery Resistance Manufacturer,Supplier and Exporter in India

Apparatus for Studying f.e.m. and Internal Battery and Battery Resistance (Product Code: SCL-241/030) is a physics experiment kit used to measure the electromotive force (EMF, written f.e.m. in the name) and the internal resistance of a battery in school and college electricity practicals. Students work with three (3–4.5) V batteries in their own boxes and read current and terminal voltage on digital meters while a rheostat varies the load. The kit is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India.

Specifications

What Is the EMF and Internal Resistance Apparatus Used For?

A battery never delivers its full EMF to an external circuit, because part of it is lost across the battery’s own internal resistance. With this apparatus, students connect one battery in series with the rheostat, the digital ammeter and the power switch, and place the digital voltmeter across the battery terminals. Each rheostat setting gives a new pair of current and terminal-voltage readings.

Plotting terminal voltage against current gives a straight line described by V = E − Ir: the intercept on the voltage axis is the EMF and the magnitude of the slope is the internal resistance. As an electricity experiment kit for school groups, it gives the clearest results when the rheostat starts at maximum resistance, the switch is opened between readings so the battery does not run down, and red connectors always go to the positive terminal. Repeating the test with each of the three batteries lets the class compare their results.

What to Specify When Ordering

• Number of kits required, so that each student group has its own three batteries and pair of meters.
• Whether spare (3–4.5) V batteries should be quoted for later practical sessions.
• Extra red and blue conductor wires if you plan to build additional circuits alongside this experiment.
• Delivery destination (within India or international) so the quotation can include suitable packing.

OEM Manufacturer

ScienceLab is the trading name of Jain Scientific Equipments Private Limited, the OEM (original equipment manufacturer) of this EMF and internal resistance apparatus. The kit is made and assembled at the company’s own licensed factory at Saha, Ambala, Haryana, rather than being bought in from a trader, and it is supplied factory-direct to schools, colleges, institutions, dealers and importers.

The company is a registered MSME (Udyam UDYAM-HR-01-0003714), and its export consignments are handled under Importer-Exporter Code AAECJ8618A issued by the DGFT. Replacement parts and repeat orders are handled by the manufacturer itself — just ask us. Learn more on the ScienceLab company profile.

Related Laboratory Equipment

These items are often used with the EMF and internal resistance apparatus in the same electricity practical:

• Rheostat — an extra variable resistor for a second student circuit.
• Digital Ammeter — an additional current meter for larger classes.
• Digital Voltmeter — a second voltmeter for measuring across the load as well as the battery.
• Connecting Wire — spare leads for building extended circuits.
• Apparatus for Studying Circuits for Series and Parallel Connections — a follow-on experiment on combining resistances.

See the full range in our Laboratory Equipment category.

Frequently Asked Questions

What is included with the Apparatus for Studying f.e.m. and Internal Battery and Battery Resistance?
The Apparatus for Studying f.e.m. and Internal Battery and Battery Resistance includes three (3–4.5) V batteries with their boxes, a digital ammeter, a digital voltmeter, a rheostat, six pairs of conductor wires with red and blue connectors, and a power switch rated for 36 V and 0–3 A direct current.

How do students find the EMF and internal resistance with this apparatus?
With the EMF and internal resistance apparatus (SCL-241/030), students record current and terminal voltage at several rheostat settings and plot voltage against current. The voltage-axis intercept of the straight line gives the battery’s EMF, and the slope gives its internal resistance, following V = E − Ir.

What does f.e.m. mean in the product name?
In the name Apparatus for Studying f.e.m. and Internal Battery and Battery Resistance, f.e.m. is the abbreviation used in several European languages, such as Spanish fuerza electromotriz, for electromotive force (EMF). The apparatus therefore studies a battery’s EMF together with its internal resistance.

Who manufactures the Apparatus for Studying f.e.m. and Internal Battery and Battery Resistance?
This EMF and internal resistance apparatus, code SCL-241/030, is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab) as the OEM, at its own licensed factory at Saha, Ambala, Haryana, India. Buyers deal directly with the manufacturer for quotations, repeat orders and spare-part enquiries.

Is a calibration certificate available for the digital meters?
Calibration-certificate availability for the digital ammeter and voltmeter in the EMF and internal resistance apparatus (SCL-241/030) should be discussed with us before you order. Please state the requirement through the contact page so it can be addressed in your quotation.

Can the apparatus be ordered in bulk or for export?
Yes. The Apparatus for Studying f.e.m. and Internal Battery and Battery Resistance can be quoted in class-set quantities for schools, colleges and dealers in India and international markets. Share the quantity, delivery destination and any tender format with ScienceLab to receive a quotation.

Request a Quote

To request a quotation for the Apparatus for Studying f.e.m. and Internal Battery and Battery Resistance (SCL-241/030), send your quantity and delivery details through our contact page or add the product to the enquiry cart. Quotes come direct from the manufacturer, ScienceLab, Ambala.

Last updated: 24 September 2026