An ammeter has 20 divisions between 0 A and 2 A. The least count of ammeter is
0.1 A
The least count of any measuring instrument is the smallest value that can be measured accurately using that instrument. In this case, the ammeter has a range of 2 A (from 0 A to 2 A) and has 20 divisions within that range.
To calculate the least count, we divide the range of the ammeter by the number of divisions:
Least Count = \(\frac{\text{Range}}{\text{Number of divisions}}\)
Least Count = \(\frac{2 A}{20}\)
Least Count = 0.1 A
Therefore, the least count of the ammeter is 0.1 A.
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