Question

A measuring device has a main scale whose smallest division is 0.2mm and 200
divisions on vernier scale. Which among the following would be the least count of
this device?​

Answer 1

Answer:

Number of division on VS=20

1 cm on Main scale (MS)=20 division

So 1 MSD=

20

1

=0.05cm

Least count, LC=

No. of VS division

1 MSD

=

20

0.05

=0.0025 cm

Explanation:

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