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Least Count

A vernier cal...

Question

A vernier calliper was used to measure the diameter of a ball and the measurement was reported as 2.35 cm. What could be the least count of the instrument?

A

1039

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B

1039.784

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C

1040

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D

104

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Solution

The correct options are
B
1039.784

C
1040

The magnitude of the measurement is always a multiple of the least count. 0.01 cm and 0.05 cm could be the least counts. If the least count was 0.02 cm, then, the last digit of the measurement would be even. If the least count was 0.1 cm, the number of digits in the measurement would be less.

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