The reading law of electric meters in college physics experiments, how many decimal places are needed for different scales and different ranges, and how to estimate them? Examples can be given to facilitate understanding. Reading is simple. If the minimum scale of the first category is 1, then the estimated reading is from 0. 1.2 to 0.9; If the minimum scale is 0. 1, the estimated reading is 0.0 1.02 to 0.09; If the minimum scale is 0.0 1, the estimated reading is 0.006544.

The second minimum scale is 0.2, and the estimated reading is 0. 1. If the minimum scale is 0.3, it is estimated to be 0. 1, 0.2 and so on. In short, this is my own summary. How many people did you call? Never heard of uncertainty? I study physics, but I really don't know the uncertainty. I guess no one will answer.