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Units and Measurements

Section: Physics

Question : 25 of 36

Marks: +1, -0

If the pitch of the screw gauge is twice the least count of the Vernier callipers,the least count of the screw gauge is 0.01 mm.
If the pinch of the screw gauge is twice the least count of the Vernier callipers,the least count of the screw gauge is 0.005 mm
If the least count of the linear scale of the screw gauge is twice the least count of the Vernier callipers,the least count o f the screw gauge is 0.1 mm
If the least count of the linear scale of the screw gauge is twice the least count of the Vernier callipers,the least count o f the screw gauge is 0.005 mm

Solution:

For vernier callipers,

1 main scale division=

\frac{1}{8}

1 vernier scale division =

\frac{1}{10}

So least count=

\frac{1}{40} \text{ cm}

For screw gauge.

pitch(p)=2 main scale division

So least count=

\frac{p}{100}

So option (1) and (2) are correct.

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