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Question

One 8cm on the main scale of the vernier callipers is divided into 10 equal parts. If the 10 divisions of the vernier concide with the small divisions the main scale, the least 10 divisions of the callipers is :

A
0.005 cm
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B
0.002 cm
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C
0.01 cm
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D
0.05 cm
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Solution

The correct option is D 0.01 cm

Vernier caliper is an instrument used to measure the internal and external diameters of small tubes.

The least count is the finest measurement you can take with the help of that vernier calipers.

So least count= 1 MSD-1VSD

Here 10 vsd=9 msd

1 vsd=.9 msd

From above LC= 1MSD-1VSD

LC=1MSD-.9MSD=.1MSD(which is equal to 0.1 mm).

Least count =0.1 mm


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