China Wholesale Magnetic Field Factory – LEEM-25 Potentiometer Experiment – Labor

The main technical parameters
1. DC stabilized power supply: 4.5V, three-and-a-half digital display, with current limiting device;
2. Standard electric potential: 1.0186V, accuracy ±0.01%, constant temperature automatic compensation;
3. Digital galvanometer: 5×10-4, 10-6, 10-8, 10-9A four-speed adjustable sensitivity;
4. Resistance box: (0～10)×(1000+100+10+1)Ω, ±0.1%
5. Two EMFs to be measured, No. 1 battery box, with a voltage divider box inside.
6. The shell of the eleven-wire potentiometer is made of plexiglass, with intuitive internal structure and small size;
7. Each resistance wire is equivalent to one meter, and the resistance value is 10Ω;
8. Ten resistance wires are wound on a plexiglass rod, arranged in a transparent case, and connected in series with each other;
9. The eleventh resistance wire is wound on the rotatable resistance disc, and the scale is equally divided into 100 divisions. Using the vernier, it can be accurate to 1mm; the total series resistance is 110Ω.
10. An ordinary eleven-wire potentiometer can be selected for experiment