The measurement of electrical properties of linear or nonlinear components by V-I method is an important lab topic in college physics training. This experimental apparatus can help students to understand the principles of current-limiting or voltage-dividing of resistances in serial or parallel connections, and understand the electrical characteristics of different components, while master the method for measuring V-I characteristics of regular diode, Zener diode, light-emitting diode and ordinary tungsten bulb.
LEEI-52 apparatus consists of a 5 VDC regulated power supply, a digital voltage meter, a digital current meter, variable resistors, a regular diode, a Zener diode, a light-emitting diode, a tungsten bulb and so on. The following objectives can be achieved:
1. Master the method and the basic circuit of measuring V-I characteristics of nonlinear components.
2. Master the basic characteristics of diodes, Zener diodes and light-emitting diodes. Accurately measure their forward threshold voltages.
3. Plot the graphs of V-I characteristic curves of the above three nonlinear components.
The instruction manual contains experimental configurations, principles and step-by-step instructions. Please click Experiment Theory and Contents to find more information about this apparatus.
|Voltage source||+5 VDC, 0.5 A|
|Digital voltmeter||0 ~ 1.999 V, resolution, 0.001V; 0 ~ 19.99 V, resolution 0.01 V|
|Digital ammeter||0 ~ 200 mA, resolution 0.01 mA|
|Power consumption||< 10 W|
|Main electric suitcase unit||1|
|Experimental instruction manual||1|