Electrical Thermionic Fundamentals Trainer or Work Function of Tungsten & Richardson's Equation (V.V.) (C.R.) Manufacturer,Supplier and Exporter in India
Product Code : SCL-EELE-12306
Indian Lab Suppliers supplies the Electrical Thermionic Fundamentals Trainer or Work Function of Tungsten & Richardson's Equation (V.V.) (C.R.) (Product ID: 12306) as part of its electronics engineering lab equipment range. It determines the work function of tungsten and verifies Richardson’s equation with a directly heated diode valve.
Quick Answer
Separate IC-regulated supplies feed the filament and the plate, each with its own digital voltmeter and current meter. Students raise the filament current in steps, find the filament temperature from its electrical readings, and record the saturated plate (emission) current at each temperature. Richardson’s equation, J = AT2e−W/kT, predicts that log(I/T2) plotted against 1/T is a straight line, and its slope gives the work function W (about 4.5 eV for tungsten). The board needs no other apparatus. The valve runs hot, so allow it to cool before touching.
Key Specifications
| Parameter | Detail |
|---|---|
| Experiments | Thermionic work function of tungsten; verification of Richardson’s equation |
| Valve | Directly heated diode |
| Supplies | IC-regulated filament supply; IC-regulated plate supply |
| Meters | Digital voltmeter and current meter for filament; digital voltmeter and current meter for plate |
| Mains | 230 V ±10%, 50 Hz AC |
| Other apparatus | None required |
Where This Is Used
Used in modern-physics practicals at undergraduate level. Related: Ionisation Potential of Mercury using gas filled diode with Power Supply and 2 digital meters (V.V.) (C.R.) (Product ID: 12305) and Critical Potentials of an atomic gas filled in Electronic Valve with Power Supply and 1 digital meter (Product ID: 12310). Browse the full Electronics Engineering Lab Equipment range or related Physics Lab Equipment products.
Frequently Asked Questions
What does the Richardson plot give?
A straight line of log(I/T2) against 1/T whose slope gives the work function.
What type of valve is used?
A directly heated diode with a tungsten filament.
How many meters are fitted?
Four digital meters: voltage and current for both filament and plate.
Related Categories
Electronics Engineering Lab Equipment · Physics Lab Equipment · Electronics Lab Equipment
Request a Quote
For pricing, bulk quantities or tender documentation on the Electrical Thermionic Fundamentals Trainer or Work Function of Tungsten & Richardson's Equation (V.V.) (C.R.), reach our team via Contact Us or submit your requirement through our Tenders page.
.png)
 with power supply-Photoroom (1).png)
.png)
.jpg)
.jpeg)