Option 3-1 p47: experiment " fulfilling small light bulbs "
Purpose of the experiment:
1. Knowledge of the method of use and connection of sliding transformers.
2. The way in which the va curves are depicted.
3. Understand why the volamic curve of the small beads is not a straight line
Experimental principles
Experimental equipment
Classbooks:
Experimental principles: power supply circuits and measurement circuits
Transformer wiring diagram
Data processing
High examination study:
Figure 1 is a physical connection map of the experiment "foot quantico" by little hung.
(1) draw experimental circuit maps based on figure 1;
(2) the modems for the smoothing transformer are shown in graphs 1, 2, 3 and 4 for two sets of current tables and voltage tables, with a scale of 0. 6a and a scale of 3v., with the readings of 1:2, 3 and 4.
(i) an experimental circuit chart based on physical circuit maps, as shown in figure 1, with slide transformers using a sub-pressure method and an external current chart, as shown in the figure:
(2) the scale of the current meter is 0. 6a, with a minimum of 0. 02a, so that only the smallest degree is estimated at the reading time, so it is 0. 10a, 0. 24a, respectively
The scale of the voltage table is 3v, with a minimum scale of 0. 1 v, so it is necessary to estimate the next minimum scale when reading the number, so it is 2. 00 v, 0. 27 v, respectively
R1 = 8. 3 times r2 = 2. 7 times
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