Question 188: Units , Dimensions and Error Analysis

Question

The least count of the main scale of a screw gauge is 1 mm. The minimum number of divisions on its circular scale required to measure 5 $$\mu $$m diameter of a wire is :

Accepted Answer

Least count = $${{Pitch} \over {Number\,\,of\,\,division\,\,on\,\,circular\,scale}}$$
5 $$ 	imes $$ 10
$$-$$6
= $${{{{10}^{ - 3}}} \over N}$$
N = 200

Answer

500

Answer

100

Answer

200

Answer

50

Units , Dimensions and Error Analysis

The least count of the main scale of a screw gauge is 1 mm. The minimum number of divisions on its circular scale required to measure 5 $\mu $m diameter of a wire is :

Choose the correct answer: