Temp. of a torch bulb filament by its resistance measurement with Power Supply and 2 digital meters (C.R.) Manufacturer,Supplier and Exporter in India
Product Code : SCL-EELE-12296
Indian Lab Suppliers supplies the Temp. of a torch bulb filament by its resistance measurement with Power Supply and 2 digital meters (C.R.) (Product ID: 12296) as part of its electronics engineering lab equipment range. It finds the temperature of a torch-bulb filament from its hot and cold resistance.
Quick Answer
Tungsten resistance rises steadily with temperature, so the ratio of the filament’s hot resistance to its cold (room-temperature) resistance gives the filament temperature. The bulb is fed from a 0-6 V DC, 2 A IC-regulated, short-circuit-protected supply with coarse and fine controls. Two 3½-digit LED panel meters read voltage (19.99 V range, 10 mV resolution, 10 MΩ input) and current (1.999 A range, 1 mA resolution, 0.1 Ω), each with ±0.2% ±1 digit accuracy. No other apparatus is needed. The bulb is hot after use.
Key Specifications
| Parameter | Detail |
|---|---|
| Experiment | Temperature of a torch-bulb filament from resistance measurement |
| Power supply | 0-6 V DC at 2 A, IC regulated, short-circuit protected, coarse and fine control |
| Voltmeter | Digital, 19.99 V range, 10 mV resolution, 10 MΩ input |
| Ammeter | Digital, 1.999 A range, 1 mA resolution, 0.1 Ω |
| Meter accuracy | ±0.2% ±1 digit |
| Display | 3½-digit, 7-segment LED, 12.5 mm; auto polarity; overload shown by 1 with other digits blank |
| Lamp | Incandescent torch bulb |
| Mains | 230 V ±10%, 50 Hz AC; ON/OFF switch and fuse |
Where This Is Used
Used in heat and electricity practicals at college level. Related: Study of Variation of Total Thermal Radiation with Temperature with power supply and 2 dual range meters (C.R.) (Product ID: 12266) and Stefan's Law of Radiation by using an Incandescent Lamp with Power Supply and 2 digital meters (C.R.) (Product ID: 12298). Browse the full Electronics Engineering Lab Equipment range or related Physics Lab Equipment products.
Frequently Asked Questions
How is the cold resistance measured?
At a very small current, so the filament stays near room temperature.
What resolution do the meters give?
10 mV on voltage and 1 mA on current.
Is the supply protected?
Yes, it is short-circuit protected.
Related Categories
Electronics Engineering Lab Equipment · Physics Lab Equipment · Electronics Lab Equipment
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