Question:
4: There are 20 divisions in 4 cm of the main scale . The vernier scale has 10 divisions . The least count of the instrument is
Answer:
Least count,LC = Smallest division on main scale / Number of divisions on vernier scale
Given,
Division on vernier scale =10
20 divisions of main scale in 4 cm
So,1 cm of main scale contains 5 divisions.
Smallest division on main scale= 1/5 cm
Therefore, LC = (1/5) /10 = 1/50
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