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Significant Figures in Product

In a screw ga...

Question

In a screw gauge, the pitch of the screw is 0.5 mm and the number of circular scale divisions is 50, then the least count is __________ mm.

A

0.05

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B

0.01

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C

0.5

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D

0.025

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Solution

The correct option is B 0.01
Pitch $P = 0.5 m m$
Number of divisions $N = 50$
Least count $L . C = \frac{P}{N} = \frac{0.5 m m}{50} = 0.01 m m$

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