I Diameter of a small ball bearing II Thickness... - JAMB Physics 2009 Question
I. Diameter of a small ball bearing.
II. Thickness of a pieces of paper.
III. Diameter of a measuring cylinder.
IV. Length of a piece of wire.
Which of the above can be measured using a micrometer screw gauge?
A
I, II and IV only .
B
I and II only
C
II and III only
D
III and IV only
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Correct Option: B
Of all the instruments used in measuring length,the micrometer screw gauge has the highest reading accuracy (0.01 mm), and is therefore used in measuring very small length such as diameter of a small ball bearing, and thickness of a piece of paper.
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