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Significant Figures in Product

The least cou...

Question

The least count of a screw gauge having 1 mm pitch and 100 circular scale divisions is ____ $μ m$

A

100

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B

10

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C

1

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D

0.0001

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Solution

The correct option is B 10
Pitch $P = 1 m m$
Number of divisions $N = 100$
Least count $L . C = \frac{P}{N} = \frac{1 m m}{100} = 0.01 m m = 10 μ m$

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